Home / 10,115.25-15,172.88-3,189.75

Finding the Fourth Proportional to 10,115.25, 15,172.88 and 3,189.75

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Solution

The fourth proportional to 10,115.25, 15,172.88 and 3,189.75 is: 4,784.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.25 : 15,172.88 = 3,189.75 : x
  2. Step 2: Convert to fraction form
    10,115.25/15,172.88 = 3,189.75/x
  3. Step 3: Cross multiply
    10,115.25x = 15,172.88 × 3,189.75
  4. Step 4: Simplify right side
    10,115.25x = 48,397,678.03
  5. Step 5: Solve for x
    x = 48,397,678.03/10,115.25
  6. Step 6: Final answer
    x = 4,784.63

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.