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Finding the Fourth Proportional to 8,613.76, 12,919.92 and 3,418.24

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Solution

The fourth proportional to 8,613.76, 12,919.92 and 3,418.24 is: 5,127.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.76 : 12,919.92 = 3,418.24 : x
  2. Step 2: Convert to fraction form
    8,613.76/12,919.92 = 3,418.24/x
  3. Step 3: Cross multiply
    8,613.76x = 12,919.92 × 3,418.24
  4. Step 4: Simplify right side
    8,613.76x = 44,163,387.34
  5. Step 5: Solve for x
    x = 44,163,387.34/8,613.76
  6. Step 6: Final answer
    x = 5,127.07

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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.