Home / 8,972.32-13,458.78-3,129.38

Finding the Fourth Proportional to 8,972.32, 13,458.78 and 3,129.38

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Solution

The fourth proportional to 8,972.32, 13,458.78 and 3,129.38 is: 4,694.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.32 : 13,458.78 = 3,129.38 : x
  2. Step 2: Convert to fraction form
    8,972.32/13,458.78 = 3,129.38/x
  3. Step 3: Cross multiply
    8,972.32x = 13,458.78 × 3,129.38
  4. Step 4: Simplify right side
    8,972.32x = 42,117,704.64
  5. Step 5: Solve for x
    x = 42,117,704.64/8,972.32
  6. Step 6: Final answer
    x = 4,694.18

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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.