Home / 20,770.12-28,663.37-11,817.55

Finding the Fourth Proportional to 20,770.12, 28,663.37 and 11,817.55

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Solution

The fourth proportional to 20,770.12, 28,663.37 and 11,817.55 is: 16,308.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.12 : 28,663.37 = 11,817.55 : x
  2. Step 2: Convert to fraction form
    20,770.12/28,663.37 = 11,817.55/x
  3. Step 3: Cross multiply
    20,770.12x = 28,663.37 × 11,817.55
  4. Step 4: Simplify right side
    20,770.12x = 338,730,667.97
  5. Step 5: Solve for x
    x = 338,730,667.97/20,770.12
  6. Step 6: Final answer
    x = 16,308.56

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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.