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Finding the Fourth Proportional to 28,753.26, 43,129.89 and 7,976.76

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Solution

The fourth proportional to 28,753.26, 43,129.89 and 7,976.76 is: 11,965.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,753.26 : 43,129.89 = 7,976.76 : x
  2. Step 2: Convert to fraction form
    28,753.26/43,129.89 = 7,976.76/x
  3. Step 3: Cross multiply
    28,753.26x = 43,129.89 × 7,976.76
  4. Step 4: Simplify right side
    28,753.26x = 344,036,781.36
  5. Step 5: Solve for x
    x = 344,036,781.36/28,753.26
  6. Step 6: Final answer
    x = 11,965.14

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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.