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Finding the Fourth Proportional to 8,613.44, 12,918.24 and 3,417.92

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Solution

The fourth proportional to 8,613.44, 12,918.24 and 3,417.92 is: 5,126.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.44 : 12,918.24 = 3,417.92 : x
  2. Step 2: Convert to fraction form
    8,613.44/12,918.24 = 3,417.92/x
  3. Step 3: Cross multiply
    8,613.44x = 12,918.24 × 3,417.92
  4. Step 4: Simplify right side
    8,613.44x = 44,153,510.86
  5. Step 5: Solve for x
    x = 44,153,510.86/8,613.44
  6. Step 6: Final answer
    x = 5,126.12

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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.