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Finding the Fourth Proportional to 20,162.88, 30,248.96 and 7,850.88

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Solution

The fourth proportional to 20,162.88, 30,248.96 and 7,850.88 is: 11,778.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,162.88 : 30,248.96 = 7,850.88 : x
  2. Step 2: Convert to fraction form
    20,162.88/30,248.96 = 7,850.88/x
  3. Step 3: Cross multiply
    20,162.88x = 30,248.96 × 7,850.88
  4. Step 4: Simplify right side
    20,162.88x = 237,480,955.08
  5. Step 5: Solve for x
    x = 237,480,955.08/20,162.88
  6. Step 6: Final answer
    x = 11,778.13

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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.