Home / 28,130.59-38,802.27-21,401.47

Finding the Fourth Proportional to 28,130.59, 38,802.27 and 21,401.47

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Solution

The fourth proportional to 28,130.59, 38,802.27 and 21,401.47 is: 29,520.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.59 : 38,802.27 = 21,401.47 : x
  2. Step 2: Convert to fraction form
    28,130.59/38,802.27 = 21,401.47/x
  3. Step 3: Cross multiply
    28,130.59x = 38,802.27 × 21,401.47
  4. Step 4: Simplify right side
    28,130.59x = 830,425,617.34
  5. Step 5: Solve for x
    x = 830,425,617.34/28,130.59
  6. Step 6: Final answer
    x = 29,520.38

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Find fourth proportional to 14,065.30, 19,401.14 and 10,700.74
Half scale
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Double scale
Find fourth proportional to 28,131.59, 38,803.65 and 21,402.47
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.