Home / 20,770.43-28,663.47-11,817.97

Finding the Fourth Proportional to 20,770.43, 28,663.47 and 11,817.97

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Solution

The fourth proportional to 20,770.43, 28,663.47 and 11,817.97 is: 16,308.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.43 : 28,663.47 = 11,817.97 : x
  2. Step 2: Convert to fraction form
    20,770.43/28,663.47 = 11,817.97/x
  3. Step 3: Cross multiply
    20,770.43x = 28,663.47 × 11,817.97
  4. Step 4: Simplify right side
    20,770.43x = 338,743,956.90
  5. Step 5: Solve for x
    x = 338,743,956.90/20,770.43
  6. Step 6: Final answer
    x = 16,308.96

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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.