Home / 20,869.97-28,800.61-11,438.53

Finding the Fourth Proportional to 20,869.97, 28,800.61 and 11,438.53

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Solution

The fourth proportional to 20,869.97, 28,800.61 and 11,438.53 is: 15,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.97 : 28,800.61 = 11,438.53 : x
  2. Step 2: Convert to fraction form
    20,869.97/28,800.61 = 11,438.53/x
  3. Step 3: Cross multiply
    20,869.97x = 28,800.61 × 11,438.53
  4. Step 4: Simplify right side
    20,869.97x = 329,436,641.50
  5. Step 5: Solve for x
    x = 329,436,641.50/20,869.97
  6. Step 6: Final answer
    x = 15,785.20

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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.