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Finding the Fourth Proportional to 8,761.78, 13,135.69 and 5,059.81

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Solution

The fourth proportional to 8,761.78, 13,135.69 and 5,059.81 is: 7,585.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.78 : 13,135.69 = 5,059.81 : x
  2. Step 2: Convert to fraction form
    8,761.78/13,135.69 = 5,059.81/x
  3. Step 3: Cross multiply
    8,761.78x = 13,135.69 × 5,059.81
  4. Step 4: Simplify right side
    8,761.78x = 66,464,095.62
  5. Step 5: Solve for x
    x = 66,464,095.62/8,761.78
  6. Step 6: Final answer
    x = 7,585.68

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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.