Home / 20,869.64-28,800.33-11,438

Finding the Fourth Proportional to 20,869.64, 28,800.33 and 11,438

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Solution

The fourth proportional to 20,869.64, 28,800.33 and 11,438 is: 15,784.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.64 : 28,800.33 = 11,438 : x
  2. Step 2: Convert to fraction form
    20,869.64/28,800.33 = 11,438/x
  3. Step 3: Cross multiply
    20,869.64x = 28,800.33 × 11,438
  4. Step 4: Simplify right side
    20,869.64x = 329,418,174.54
  5. Step 5: Solve for x
    x = 329,418,174.54/20,869.64
  6. Step 6: Final answer
    x = 15,784.56

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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.