Home / 28,428.17-39,229.88-15,681.60

Finding the Fourth Proportional to 28,428.17, 39,229.88 and 15,681.60

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Solution

The fourth proportional to 28,428.17, 39,229.88 and 15,681.60 is: 21,640.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.17 : 39,229.88 = 15,681.60 : x
  2. Step 2: Convert to fraction form
    28,428.17/39,229.88 = 15,681.60/x
  3. Step 3: Cross multiply
    28,428.17x = 39,229.88 × 15,681.60
  4. Step 4: Simplify right side
    28,428.17x = 615,187,207.80
  5. Step 5: Solve for x
    x = 615,187,207.80/28,428.17
  6. Step 6: Final answer
    x = 21,640.06

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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.