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Finding the Fourth Proportional to 8,967.78, 12,375.72 and 4,988.79

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Solution

The fourth proportional to 8,967.78, 12,375.72 and 4,988.79 is: 6,884.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,967.78 : 12,375.72 = 4,988.79 : x
  2. Step 2: Convert to fraction form
    8,967.78/12,375.72 = 4,988.79/x
  3. Step 3: Cross multiply
    8,967.78x = 12,375.72 × 4,988.79
  4. Step 4: Simplify right side
    8,967.78x = 61,739,868.18
  5. Step 5: Solve for x
    x = 61,739,868.18/8,967.78
  6. Step 6: Final answer
    x = 6,884.63

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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.