Home / 20,691.75-28,555.27-11,739.63

Finding the Fourth Proportional to 20,691.75, 28,555.27 and 11,739.63

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Solution

The fourth proportional to 20,691.75, 28,555.27 and 11,739.63 is: 16,201.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.75 : 28,555.27 = 11,739.63 : x
  2. Step 2: Convert to fraction form
    20,691.75/28,555.27 = 11,739.63/x
  3. Step 3: Cross multiply
    20,691.75x = 28,555.27 × 11,739.63
  4. Step 4: Simplify right side
    20,691.75x = 335,228,331.71
  5. Step 5: Solve for x
    x = 335,228,331.71/20,691.75
  6. Step 6: Final answer
    x = 16,201.06

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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.