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Finding the Fourth Proportional to 8,391.56, 12,585.92 and 4,233.42

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Solution

The fourth proportional to 8,391.56, 12,585.92 and 4,233.42 is: 6,349.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.56 : 12,585.92 = 4,233.42 : x
  2. Step 2: Convert to fraction form
    8,391.56/12,585.92 = 4,233.42/x
  3. Step 3: Cross multiply
    8,391.56x = 12,585.92 × 4,233.42
  4. Step 4: Simplify right side
    8,391.56x = 53,281,464.28
  5. Step 5: Solve for x
    x = 53,281,464.28/8,391.56
  6. Step 6: Final answer
    x = 6,349.41

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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.