Home / 20,934.91-31,447.32-13,149.19

Finding the Fourth Proportional to 20,934.91, 31,447.32 and 13,149.19

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Solution

The fourth proportional to 20,934.91, 31,447.32 and 13,149.19 is: 19,752.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.91 : 31,447.32 = 13,149.19 : x
  2. Step 2: Convert to fraction form
    20,934.91/31,447.32 = 13,149.19/x
  3. Step 3: Cross multiply
    20,934.91x = 31,447.32 × 13,149.19
  4. Step 4: Simplify right side
    20,934.91x = 413,506,785.67
  5. Step 5: Solve for x
    x = 413,506,785.67/20,934.91
  6. Step 6: Final answer
    x = 19,752.02

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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.