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Finding the Fourth Proportional to 8,613.15, 12,919.42 and 2,457.15

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Solution

The fourth proportional to 8,613.15, 12,919.42 and 2,457.15 is: 3,685.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.15 : 12,919.42 = 2,457.15 : x
  2. Step 2: Convert to fraction form
    8,613.15/12,919.42 = 2,457.15/x
  3. Step 3: Cross multiply
    8,613.15x = 12,919.42 × 2,457.15
  4. Step 4: Simplify right side
    8,613.15x = 31,744,952.85
  5. Step 5: Solve for x
    x = 31,744,952.85/8,613.15
  6. Step 6: Final answer
    x = 3,685.64

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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.