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Finding the Fourth Proportional to 8,761.67, 13,142.44 and 2,187.81

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Solution

The fourth proportional to 8,761.67, 13,142.44 and 2,187.81 is: 3,281.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.67 : 13,142.44 = 2,187.81 : x
  2. Step 2: Convert to fraction form
    8,761.67/13,142.44 = 2,187.81/x
  3. Step 3: Cross multiply
    8,761.67x = 13,142.44 × 2,187.81
  4. Step 4: Simplify right side
    8,761.67x = 28,753,172.61
  5. Step 5: Solve for x
    x = 28,753,172.61/8,761.67
  6. Step 6: Final answer
    x = 3,281.70

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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.