Home / 20,930.25-28,883.76-11,499.42

Finding the Fourth Proportional to 20,930.25, 28,883.76 and 11,499.42

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Solution

The fourth proportional to 20,930.25, 28,883.76 and 11,499.42 is: 15,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.25 : 28,883.76 = 11,499.42 : x
  2. Step 2: Convert to fraction form
    20,930.25/28,883.76 = 11,499.42/x
  3. Step 3: Cross multiply
    20,930.25x = 28,883.76 × 11,499.42
  4. Step 4: Simplify right side
    20,930.25x = 332,146,487.42
  5. Step 5: Solve for x
    x = 332,146,487.42/20,930.25
  6. Step 6: Final answer
    x = 15,869.21

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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.