Home / 20,799.91-31,209.99-9,111.61

Finding the Fourth Proportional to 20,799.91, 31,209.99 and 9,111.61

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Solution

The fourth proportional to 20,799.91, 31,209.99 and 9,111.61 is: 13,671.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.91 : 31,209.99 = 9,111.61 : x
  2. Step 2: Convert to fraction form
    20,799.91/31,209.99 = 9,111.61/x
  3. Step 3: Cross multiply
    20,799.91x = 31,209.99 × 9,111.61
  4. Step 4: Simplify right side
    20,799.91x = 284,373,256.98
  5. Step 5: Solve for x
    x = 284,373,256.98/20,799.91
  6. Step 6: Final answer
    x = 13,671.85

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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.