Home / 20,716.65-28,591.04-12,649.86

Finding the Fourth Proportional to 20,716.65, 28,591.04 and 12,649.86

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Solution

The fourth proportional to 20,716.65, 28,591.04 and 12,649.86 is: 17,458.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.65 : 28,591.04 = 12,649.86 : x
  2. Step 2: Convert to fraction form
    20,716.65/28,591.04 = 12,649.86/x
  3. Step 3: Cross multiply
    20,716.65x = 28,591.04 × 12,649.86
  4. Step 4: Simplify right side
    20,716.65x = 361,672,447.05
  5. Step 5: Solve for x
    x = 361,672,447.05/20,716.65
  6. Step 6: Final answer
    x = 17,458.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.