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Finding the Fourth Proportional to 7,881.92, 11,822.90 and 2,951.45

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Solution

The fourth proportional to 7,881.92, 11,822.90 and 2,951.45 is: 4,427.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.92 : 11,822.90 = 2,951.45 : x
  2. Step 2: Convert to fraction form
    7,881.92/11,822.90 = 2,951.45/x
  3. Step 3: Cross multiply
    7,881.92x = 11,822.90 × 2,951.45
  4. Step 4: Simplify right side
    7,881.92x = 34,894,624.33
  5. Step 5: Solve for x
    x = 34,894,624.33/7,881.92
  6. Step 6: Final answer
    x = 4,427.18

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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.