Home / 28,426.62-39,227.76-15,680.30

Finding the Fourth Proportional to 28,426.62, 39,227.76 and 15,680.30

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Solution

The fourth proportional to 28,426.62, 39,227.76 and 15,680.30 is: 21,638.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.62 : 39,227.76 = 15,680.30 : x
  2. Step 2: Convert to fraction form
    28,426.62/39,227.76 = 15,680.30/x
  3. Step 3: Cross multiply
    28,426.62x = 39,227.76 × 15,680.30
  4. Step 4: Simplify right side
    28,426.62x = 615,103,045.13
  5. Step 5: Solve for x
    x = 615,103,045.13/28,426.62
  6. Step 6: Final answer
    x = 21,638.28

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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.