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Finding the Fourth Proportional to 15,061.14, 20,784.92 and 9,091.65

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Solution

The fourth proportional to 15,061.14, 20,784.92 and 9,091.65 is: 12,546.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.14 : 20,784.92 = 9,091.65 : x
  2. Step 2: Convert to fraction form
    15,061.14/20,784.92 = 9,091.65/x
  3. Step 3: Cross multiply
    15,061.14x = 20,784.92 × 9,091.65
  4. Step 4: Simplify right side
    15,061.14x = 188,969,217.92
  5. Step 5: Solve for x
    x = 188,969,217.92/15,061.14
  6. Step 6: Final answer
    x = 12,546.81

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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.