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Finding the Fourth Proportional to 7,881.35, 11,787.17 and 7,009.97

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Solution

The fourth proportional to 7,881.35, 11,787.17 and 7,009.97 is: 10,483.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.35 : 11,787.17 = 7,009.97 : x
  2. Step 2: Convert to fraction form
    7,881.35/11,787.17 = 7,009.97/x
  3. Step 3: Cross multiply
    7,881.35x = 11,787.17 × 7,009.97
  4. Step 4: Simplify right side
    7,881.35x = 82,627,755.08
  5. Step 5: Solve for x
    x = 82,627,755.08/7,881.35
  6. Step 6: Final answer
    x = 10,483.96

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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.