Home / 21,470.91-29,631.54-12,517.80

Finding the Fourth Proportional to 21,470.91, 29,631.54 and 12,517.80

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Solution

The fourth proportional to 21,470.91, 29,631.54 and 12,517.80 is: 17,275.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.91 : 29,631.54 = 12,517.80 : x
  2. Step 2: Convert to fraction form
    21,470.91/29,631.54 = 12,517.80/x
  3. Step 3: Cross multiply
    21,470.91x = 29,631.54 × 12,517.80
  4. Step 4: Simplify right side
    21,470.91x = 370,921,691.41
  5. Step 5: Solve for x
    x = 370,921,691.41/21,470.91
  6. Step 6: Final answer
    x = 17,275.55

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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.