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Finding the Fourth Proportional to 10,951.73, 15,120.10 and 7,127

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Solution

The fourth proportional to 10,951.73, 15,120.10 and 7,127 is: 9,839.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,951.73 : 15,120.10 = 7,127 : x
  2. Step 2: Convert to fraction form
    10,951.73/15,120.10 = 7,127/x
  3. Step 3: Cross multiply
    10,951.73x = 15,120.10 × 7,127
  4. Step 4: Simplify right side
    10,951.73x = 107,760,952.70
  5. Step 5: Solve for x
    x = 107,760,952.70/10,951.73
  6. Step 6: Final answer
    x = 9,839.63

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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.