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Finding the Fourth Proportional to 8,613.65, 12,920.17 and 2,457.65

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Solution

The fourth proportional to 8,613.65, 12,920.17 and 2,457.65 is: 3,686.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.65 : 12,920.17 = 2,457.65 : x
  2. Step 2: Convert to fraction form
    8,613.65/12,920.17 = 2,457.65/x
  3. Step 3: Cross multiply
    8,613.65x = 12,920.17 × 2,457.65
  4. Step 4: Simplify right side
    8,613.65x = 31,753,255.80
  5. Step 5: Solve for x
    x = 31,753,255.80/8,613.65
  6. Step 6: Final answer
    x = 3,686.39

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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.