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Finding the Fourth Proportional to 8,687.78, 13,031.67 and 3,492.44

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Solution

The fourth proportional to 8,687.78, 13,031.67 and 3,492.44 is: 5,238.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.78 : 13,031.67 = 3,492.44 : x
  2. Step 2: Convert to fraction form
    8,687.78/13,031.67 = 3,492.44/x
  3. Step 3: Cross multiply
    8,687.78x = 13,031.67 × 3,492.44
  4. Step 4: Simplify right side
    8,687.78x = 45,512,308.11
  5. Step 5: Solve for x
    x = 45,512,308.11/8,687.78
  6. Step 6: Final answer
    x = 5,238.66

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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.