Home / 28,420.09-39,218.02-15,672.67

Finding the Fourth Proportional to 28,420.09, 39,218.02 and 15,672.67

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Solution

The fourth proportional to 28,420.09, 39,218.02 and 15,672.67 is: 21,627.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.09 : 39,218.02 = 15,672.67 : x
  2. Step 2: Convert to fraction form
    28,420.09/39,218.02 = 15,672.67/x
  3. Step 3: Cross multiply
    28,420.09x = 39,218.02 × 15,672.67
  4. Step 4: Simplify right side
    28,420.09x = 614,651,085.51
  5. Step 5: Solve for x
    x = 614,651,085.51/28,420.09
  6. Step 6: Final answer
    x = 21,627.34

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Double scale
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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.