Home / 28,000.28-38,640.32-15,425.04

Finding the Fourth Proportional to 28,000.28, 38,640.32 and 15,425.04

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Solution

The fourth proportional to 28,000.28, 38,640.32 and 15,425.04 is: 21,286.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.28 : 38,640.32 = 15,425.04 : x
  2. Step 2: Convert to fraction form
    28,000.28/38,640.32 = 15,425.04/x
  3. Step 3: Cross multiply
    28,000.28x = 38,640.32 × 15,425.04
  4. Step 4: Simplify right side
    28,000.28x = 596,028,481.61
  5. Step 5: Solve for x
    x = 596,028,481.61/28,000.28
  6. Step 6: Final answer
    x = 21,286.52

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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.