Home / 20,511.60-28,306.02-11,080.16

Finding the Fourth Proportional to 20,511.60, 28,306.02 and 11,080.16

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Solution

The fourth proportional to 20,511.60, 28,306.02 and 11,080.16 is: 15,290.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.60 : 28,306.02 = 11,080.16 : x
  2. Step 2: Convert to fraction form
    20,511.60/28,306.02 = 11,080.16/x
  3. Step 3: Cross multiply
    20,511.60x = 28,306.02 × 11,080.16
  4. Step 4: Simplify right side
    20,511.60x = 313,635,230.56
  5. Step 5: Solve for x
    x = 313,635,230.56/20,511.60
  6. Step 6: Final answer
    x = 15,290.63

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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.