Home / 31,981.64-47,972.12-10,921.43

Finding the Fourth Proportional to 31,981.64, 47,972.12 and 10,921.43

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Solution

The fourth proportional to 31,981.64, 47,972.12 and 10,921.43 is: 16,382.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,981.64 : 47,972.12 = 10,921.43 : x
  2. Step 2: Convert to fraction form
    31,981.64/47,972.12 = 10,921.43/x
  3. Step 3: Cross multiply
    31,981.64x = 47,972.12 × 10,921.43
  4. Step 4: Simplify right side
    31,981.64x = 523,924,215.85
  5. Step 5: Solve for x
    x = 523,924,215.85/31,981.64
  6. Step 6: Final answer
    x = 16,382.03

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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.