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Finding the Fourth Proportional to 8,761.76, 13,142.84 and 2,918.84

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Solution

The fourth proportional to 8,761.76, 13,142.84 and 2,918.84 is: 4,378.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.76 : 13,142.84 = 2,918.84 : x
  2. Step 2: Convert to fraction form
    8,761.76/13,142.84 = 2,918.84/x
  3. Step 3: Cross multiply
    8,761.76x = 13,142.84 × 2,918.84
  4. Step 4: Simplify right side
    8,761.76x = 38,361,847.11
  5. Step 5: Solve for x
    x = 38,361,847.11/8,761.76
  6. Step 6: Final answer
    x = 4,378.33

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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.