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Finding the Fourth Proportional to 15,105.67, 20,843.51 and 8,731.04

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Solution

The fourth proportional to 15,105.67, 20,843.51 and 8,731.04 is: 12,047.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.67 : 20,843.51 = 8,731.04 : x
  2. Step 2: Convert to fraction form
    15,105.67/20,843.51 = 8,731.04/x
  3. Step 3: Cross multiply
    15,105.67x = 20,843.51 × 8,731.04
  4. Step 4: Simplify right side
    15,105.67x = 181,985,519.55
  5. Step 5: Solve for x
    x = 181,985,519.55/15,105.67
  6. Step 6: Final answer
    x = 12,047.50

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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.