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Finding the Fourth Proportional to 8,520.64, 12,753.42 and 5,240.32

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Solution

The fourth proportional to 8,520.64, 12,753.42 and 5,240.32 is: 7,843.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.64 : 12,753.42 = 5,240.32 : x
  2. Step 2: Convert to fraction form
    8,520.64/12,753.42 = 5,240.32/x
  3. Step 3: Cross multiply
    8,520.64x = 12,753.42 × 5,240.32
  4. Step 4: Simplify right side
    8,520.64x = 66,832,001.89
  5. Step 5: Solve for x
    x = 66,832,001.89/8,520.64
  6. Step 6: Final answer
    x = 7,843.54

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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.