Home / 20,833.38-31,236.15-11,477.88

Finding the Fourth Proportional to 20,833.38, 31,236.15 and 11,477.88

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Solution

The fourth proportional to 20,833.38, 31,236.15 and 11,477.88 is: 17,209.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.38 : 31,236.15 = 11,477.88 : x
  2. Step 2: Convert to fraction form
    20,833.38/31,236.15 = 11,477.88/x
  3. Step 3: Cross multiply
    20,833.38x = 31,236.15 × 11,477.88
  4. Step 4: Simplify right side
    20,833.38x = 358,524,781.36
  5. Step 5: Solve for x
    x = 358,524,781.36/20,833.38
  6. Step 6: Final answer
    x = 17,209.15

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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.