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Finding the Fourth Proportional to 8,565.30, 12,385.13 and 8,565.30

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Solution

The fourth proportional to 8,565.30, 12,385.13 and 8,565.30 is: 12,385.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,565.30 : 12,385.13 = 8,565.30 : x
  2. Step 2: Convert to fraction form
    8,565.30/12,385.13 = 8,565.30/x
  3. Step 3: Cross multiply
    8,565.30x = 12,385.13 × 8,565.30
  4. Step 4: Simplify right side
    8,565.30x = 106,082,311.16
  5. Step 5: Solve for x
    x = 106,082,311.16/8,565.30
  6. Step 6: Final answer
    x = 12,385.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.