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Finding the Fourth Proportional to 9,330.84, 12,876.48 and 5,139

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Solution

The fourth proportional to 9,330.84, 12,876.48 and 5,139 is: 7,091.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,330.84 : 12,876.48 = 5,139 : x
  2. Step 2: Convert to fraction form
    9,330.84/12,876.48 = 5,139/x
  3. Step 3: Cross multiply
    9,330.84x = 12,876.48 × 5,139
  4. Step 4: Simplify right side
    9,330.84x = 66,172,230.72
  5. Step 5: Solve for x
    x = 66,172,230.72/9,330.84
  6. Step 6: Final answer
    x = 7,091.78

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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.