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Finding the Fourth Proportional to 8,613.75, 12,920.67 and 2,457.75

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Solution

The fourth proportional to 8,613.75, 12,920.67 and 2,457.75 is: 3,686.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.75 : 12,920.67 = 2,457.75 : x
  2. Step 2: Convert to fraction form
    8,613.75/12,920.67 = 2,457.75/x
  3. Step 3: Cross multiply
    8,613.75x = 12,920.67 × 2,457.75
  4. Step 4: Simplify right side
    8,613.75x = 31,755,776.69
  5. Step 5: Solve for x
    x = 31,755,776.69/8,613.75
  6. Step 6: Final answer
    x = 3,686.64

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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.