Home / 12,612.90-17,387.13-8,074.92

Finding the Fourth Proportional to 12,612.90, 17,387.13 and 8,074.92

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Solution

The fourth proportional to 12,612.90, 17,387.13 and 8,074.92 is: 11,131.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.90 : 17,387.13 = 8,074.92 : x
  2. Step 2: Convert to fraction form
    12,612.90/17,387.13 = 8,074.92/x
  3. Step 3: Cross multiply
    12,612.90x = 17,387.13 × 8,074.92
  4. Step 4: Simplify right side
    12,612.90x = 140,399,683.78
  5. Step 5: Solve for x
    x = 140,399,683.78/12,612.90
  6. Step 6: Final answer
    x = 11,131.44

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Double scale
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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.