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Finding the Fourth Proportional to 8,540.72, 12,819.08 and 5,260.24

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Solution

The fourth proportional to 8,540.72, 12,819.08 and 5,260.24 is: 7,895.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.72 : 12,819.08 = 5,260.24 : x
  2. Step 2: Convert to fraction form
    8,540.72/12,819.08 = 5,260.24/x
  3. Step 3: Cross multiply
    8,540.72x = 12,819.08 × 5,260.24
  4. Step 4: Simplify right side
    8,540.72x = 67,431,437.38
  5. Step 5: Solve for x
    x = 67,431,437.38/8,540.72
  6. Step 6: Final answer
    x = 7,895.29

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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.