Home / 20,869.38-28,799.28-11,916.90

Finding the Fourth Proportional to 20,869.38, 28,799.28 and 11,916.90

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Solution

The fourth proportional to 20,869.38, 28,799.28 and 11,916.90 is: 16,445.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.38 : 28,799.28 = 11,916.90 : x
  2. Step 2: Convert to fraction form
    20,869.38/28,799.28 = 11,916.90/x
  3. Step 3: Cross multiply
    20,869.38x = 28,799.28 × 11,916.90
  4. Step 4: Simplify right side
    20,869.38x = 343,198,139.83
  5. Step 5: Solve for x
    x = 343,198,139.83/20,869.38
  6. Step 6: Final answer
    x = 16,445.06

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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.