Home / 20,530.20-28,331.52-11,098.80

Finding the Fourth Proportional to 20,530.20, 28,331.52 and 11,098.80

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Solution

The fourth proportional to 20,530.20, 28,331.52 and 11,098.80 is: 15,316.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.20 : 28,331.52 = 11,098.80 : x
  2. Step 2: Convert to fraction form
    20,530.20/28,331.52 = 11,098.80/x
  3. Step 3: Cross multiply
    20,530.20x = 28,331.52 × 11,098.80
  4. Step 4: Simplify right side
    20,530.20x = 314,445,874.18
  5. Step 5: Solve for x
    x = 314,445,874.18/20,530.20
  6. Step 6: Final answer
    x = 15,316.26

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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.