Home / 8,438.76-11,634.57-5,781.42

Finding the Fourth Proportional to 8,438.76, 11,634.57 and 5,781.42

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Solution

The fourth proportional to 8,438.76, 11,634.57 and 5,781.42 is: 7,970.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.76 : 11,634.57 = 5,781.42 : x
  2. Step 2: Convert to fraction form
    8,438.76/11,634.57 = 5,781.42/x
  3. Step 3: Cross multiply
    8,438.76x = 11,634.57 × 5,781.42
  4. Step 4: Simplify right side
    8,438.76x = 67,264,335.69
  5. Step 5: Solve for x
    x = 67,264,335.69/8,438.76
  6. Step 6: Final answer
    x = 7,970.88

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.