Home / 20,982.88-31,429-9,872.92

Finding the Fourth Proportional to 20,982.88, 31,429 and 9,872.92

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Solution

The fourth proportional to 20,982.88, 31,429 and 9,872.92 is: 14,788.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.88 : 31,429 = 9,872.92 : x
  2. Step 2: Convert to fraction form
    20,982.88/31,429 = 9,872.92/x
  3. Step 3: Cross multiply
    20,982.88x = 31,429 × 9,872.92
  4. Step 4: Simplify right side
    20,982.88x = 310,296,002.68
  5. Step 5: Solve for x
    x = 310,296,002.68/20,982.88
  6. Step 6: Final answer
    x = 14,788.06

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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.