Home / 20,691.18-28,552.62-11,615.70

Finding the Fourth Proportional to 20,691.18, 28,552.62 and 11,615.70

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Solution

The fourth proportional to 20,691.18, 28,552.62 and 11,615.70 is: 16,028.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.18 : 28,552.62 = 11,615.70 : x
  2. Step 2: Convert to fraction form
    20,691.18/28,552.62 = 11,615.70/x
  3. Step 3: Cross multiply
    20,691.18x = 28,552.62 × 11,615.70
  4. Step 4: Simplify right side
    20,691.18x = 331,658,668.13
  5. Step 5: Solve for x
    x = 331,658,668.13/20,691.18
  6. Step 6: Final answer
    x = 16,028.99

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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.