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Finding the Fourth Proportional to 8,391.42, 12,585.18 and 3,708.88

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Solution

The fourth proportional to 8,391.42, 12,585.18 and 3,708.88 is: 5,562.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.42 : 12,585.18 = 3,708.88 : x
  2. Step 2: Convert to fraction form
    8,391.42/12,585.18 = 3,708.88/x
  3. Step 3: Cross multiply
    8,391.42x = 12,585.18 × 3,708.88
  4. Step 4: Simplify right side
    8,391.42x = 46,676,890.94
  5. Step 5: Solve for x
    x = 46,676,890.94/8,391.42
  6. Step 6: Final answer
    x = 5,562.45

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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.