Home / 20,864.52-28,793-11,433.28

Finding the Fourth Proportional to 20,864.52, 28,793 and 11,433.28

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Solution

The fourth proportional to 20,864.52, 28,793 and 11,433.28 is: 15,777.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.52 : 28,793 = 11,433.28 : x
  2. Step 2: Convert to fraction form
    20,864.52/28,793 = 11,433.28/x
  3. Step 3: Cross multiply
    20,864.52x = 28,793 × 11,433.28
  4. Step 4: Simplify right side
    20,864.52x = 329,198,431.04
  5. Step 5: Solve for x
    x = 329,198,431.04/20,864.52
  6. Step 6: Final answer
    x = 15,777.91

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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.