Home / 8,778.97-12,115.20-5,329.59

Finding the Fourth Proportional to 8,778.97, 12,115.20 and 5,329.59

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Solution

The fourth proportional to 8,778.97, 12,115.20 and 5,329.59 is: 7,354.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.97 : 12,115.20 = 5,329.59 : x
  2. Step 2: Convert to fraction form
    8,778.97/12,115.20 = 5,329.59/x
  3. Step 3: Cross multiply
    8,778.97x = 12,115.20 × 5,329.59
  4. Step 4: Simplify right side
    8,778.97x = 64,569,066.64
  5. Step 5: Solve for x
    x = 64,569,066.64/8,778.97
  6. Step 6: Final answer
    x = 7,354.97

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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.