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Finding the Fourth Proportional to 15,195.80, 20,939.10 and 11,210.60

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Solution

The fourth proportional to 15,195.80, 20,939.10 and 11,210.60 is: 15,447.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.80 : 20,939.10 = 11,210.60 : x
  2. Step 2: Convert to fraction form
    15,195.80/20,939.10 = 11,210.60/x
  3. Step 3: Cross multiply
    15,195.80x = 20,939.10 × 11,210.60
  4. Step 4: Simplify right side
    15,195.80x = 234,739,874.46
  5. Step 5: Solve for x
    x = 234,739,874.46/15,195.80
  6. Step 6: Final answer
    x = 15,447.68

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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.