Home / 20,691.69-28,555.18-11,739.57

Finding the Fourth Proportional to 20,691.69, 28,555.18 and 11,739.57

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Solution

The fourth proportional to 20,691.69, 28,555.18 and 11,739.57 is: 16,200.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.69 : 28,555.18 = 11,739.57 : x
  2. Step 2: Convert to fraction form
    20,691.69/28,555.18 = 11,739.57/x
  3. Step 3: Cross multiply
    20,691.69x = 28,555.18 × 11,739.57
  4. Step 4: Simplify right side
    20,691.69x = 335,225,534.47
  5. Step 5: Solve for x
    x = 335,225,534.47/20,691.69
  6. Step 6: Final answer
    x = 16,200.97

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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.