Home / 28,423.88-39,224.42-15,678.25

Finding the Fourth Proportional to 28,423.88, 39,224.42 and 15,678.25

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Solution

The fourth proportional to 28,423.88, 39,224.42 and 15,678.25 is: 21,635.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.88 : 39,224.42 = 15,678.25 : x
  2. Step 2: Convert to fraction form
    28,423.88/39,224.42 = 15,678.25/x
  3. Step 3: Cross multiply
    28,423.88x = 39,224.42 × 15,678.25
  4. Step 4: Simplify right side
    28,423.88x = 614,970,262.87
  5. Step 5: Solve for x
    x = 614,970,262.87/28,423.88
  6. Step 6: Final answer
    x = 21,635.69

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Half scale
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Double scale
Find fourth proportional to 28,424.88, 39,225.80 and 15,679.25
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.