Home / 20,981.46-31,472.19-14,387.64

Finding the Fourth Proportional to 20,981.46, 31,472.19 and 14,387.64

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Solution

The fourth proportional to 20,981.46, 31,472.19 and 14,387.64 is: 21,581.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.46 : 31,472.19 = 14,387.64 : x
  2. Step 2: Convert to fraction form
    20,981.46/31,472.19 = 14,387.64/x
  3. Step 3: Cross multiply
    20,981.46x = 31,472.19 × 14,387.64
  4. Step 4: Simplify right side
    20,981.46x = 452,810,539.73
  5. Step 5: Solve for x
    x = 452,810,539.73/20,981.46
  6. Step 6: Final answer
    x = 21,581.46

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.