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Finding the Fourth Proportional to 7,881.88, 10,876.86 and 4,345

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Solution

The fourth proportional to 7,881.88, 10,876.86 and 4,345 is: 5,996.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.88 : 10,876.86 = 4,345 : x
  2. Step 2: Convert to fraction form
    7,881.88/10,876.86 = 4,345/x
  3. Step 3: Cross multiply
    7,881.88x = 10,876.86 × 4,345
  4. Step 4: Simplify right side
    7,881.88x = 47,259,956.70
  5. Step 5: Solve for x
    x = 47,259,956.70/7,881.88
  6. Step 6: Final answer
    x = 5,996.03

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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.