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Finding the Fourth Proportional to 12,490.92, 17,229.76 and 7,451.96

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Solution

The fourth proportional to 12,490.92, 17,229.76 and 7,451.96 is: 10,279.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.92 : 17,229.76 = 7,451.96 : x
  2. Step 2: Convert to fraction form
    12,490.92/17,229.76 = 7,451.96/x
  3. Step 3: Cross multiply
    12,490.92x = 17,229.76 × 7,451.96
  4. Step 4: Simplify right side
    12,490.92x = 128,395,482.33
  5. Step 5: Solve for x
    x = 128,395,482.33/12,490.92
  6. Step 6: Final answer
    x = 10,279.11

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Similar ratio
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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.