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Finding the Fourth Proportional to 28,781.63, 43,174.87 and 8,005.13

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Solution

The fourth proportional to 28,781.63, 43,174.87 and 8,005.13 is: 12,008.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.63 : 43,174.87 = 8,005.13 : x
  2. Step 2: Convert to fraction form
    28,781.63/43,174.87 = 8,005.13/x
  3. Step 3: Cross multiply
    28,781.63x = 43,174.87 × 8,005.13
  4. Step 4: Simplify right side
    28,781.63x = 345,620,211.20
  5. Step 5: Solve for x
    x = 345,620,211.20/28,781.63
  6. Step 6: Final answer
    x = 12,008.36

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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.