Home / 20,617.05-28,451.52-11,185.62

Finding the Fourth Proportional to 20,617.05, 28,451.52 and 11,185.62

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Solution

The fourth proportional to 20,617.05, 28,451.52 and 11,185.62 is: 15,436.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.05 : 28,451.52 = 11,185.62 : x
  2. Step 2: Convert to fraction form
    20,617.05/28,451.52 = 11,185.62/x
  3. Step 3: Cross multiply
    20,617.05x = 28,451.52 × 11,185.62
  4. Step 4: Simplify right side
    20,617.05x = 318,247,891.14
  5. Step 5: Solve for x
    x = 318,247,891.14/20,617.05
  6. Step 6: Final answer
    x = 15,436.15

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Double scale
Find fourth proportional to 20,618.05, 28,452.90 and 11,186.62
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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.