Home / 20,878.11-28,812.20-11,446.11

Finding the Fourth Proportional to 20,878.11, 28,812.20 and 11,446.11

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Solution

The fourth proportional to 20,878.11, 28,812.20 and 11,446.11 is: 15,795.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.11 : 28,812.20 = 11,446.11 : x
  2. Step 2: Convert to fraction form
    20,878.11/28,812.20 = 11,446.11/x
  3. Step 3: Cross multiply
    20,878.11x = 28,812.20 × 11,446.11
  4. Step 4: Simplify right side
    20,878.11x = 329,787,553.31
  5. Step 5: Solve for x
    x = 329,787,553.31/20,878.11
  6. Step 6: Final answer
    x = 15,795.85

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1.5x scale

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.