Home / 20,691.12-28,552.68-11,259.48

Finding the Fourth Proportional to 20,691.12, 28,552.68 and 11,259.48

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Solution

The fourth proportional to 20,691.12, 28,552.68 and 11,259.48 is: 15,537.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.12 : 28,552.68 = 11,259.48 : x
  2. Step 2: Convert to fraction form
    20,691.12/28,552.68 = 11,259.48/x
  3. Step 3: Cross multiply
    20,691.12x = 28,552.68 × 11,259.48
  4. Step 4: Simplify right side
    20,691.12x = 321,488,329.41
  5. Step 5: Solve for x
    x = 321,488,329.41/20,691.12
  6. Step 6: Final answer
    x = 15,537.50

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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.