Home / 20,808.85-28,716.31-11,377.41

Finding the Fourth Proportional to 20,808.85, 28,716.31 and 11,377.41

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Solution

The fourth proportional to 20,808.85, 28,716.31 and 11,377.41 is: 15,700.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.85 : 28,716.31 = 11,377.41 : x
  2. Step 2: Convert to fraction form
    20,808.85/28,716.31 = 11,377.41/x
  3. Step 3: Cross multiply
    20,808.85x = 28,716.31 × 11,377.41
  4. Step 4: Simplify right side
    20,808.85x = 326,717,204.11
  5. Step 5: Solve for x
    x = 326,717,204.11/20,808.85
  6. Step 6: Final answer
    x = 15,700.88

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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.