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Finding the Fourth Proportional to 10,354.20, 15,530.10 and 2,959.80

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Solution

The fourth proportional to 10,354.20, 15,530.10 and 2,959.80 is: 4,439.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,354.20 : 15,530.10 = 2,959.80 : x
  2. Step 2: Convert to fraction form
    10,354.20/15,530.10 = 2,959.80/x
  3. Step 3: Cross multiply
    10,354.20x = 15,530.10 × 2,959.80
  4. Step 4: Simplify right side
    10,354.20x = 45,965,989.98
  5. Step 5: Solve for x
    x = 45,965,989.98/10,354.20
  6. Step 6: Final answer
    x = 4,439.36

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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.