Home / 20,761.59-28,655.60-13,206.45

Finding the Fourth Proportional to 20,761.59, 28,655.60 and 13,206.45

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Solution

The fourth proportional to 20,761.59, 28,655.60 and 13,206.45 is: 18,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.59 : 28,655.60 = 13,206.45 : x
  2. Step 2: Convert to fraction form
    20,761.59/28,655.60 = 13,206.45/x
  3. Step 3: Cross multiply
    20,761.59x = 28,655.60 × 13,206.45
  4. Step 4: Simplify right side
    20,761.59x = 378,438,748.62
  5. Step 5: Solve for x
    x = 378,438,748.62/20,761.59
  6. Step 6: Final answer
    x = 18,227.83

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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.