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Finding the Fourth Proportional to 13,672.66, 20,508.29 and 5,354.20

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Solution

The fourth proportional to 13,672.66, 20,508.29 and 5,354.20 is: 8,031.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.66 : 20,508.29 = 5,354.20 : x
  2. Step 2: Convert to fraction form
    13,672.66/20,508.29 = 5,354.20/x
  3. Step 3: Cross multiply
    13,672.66x = 20,508.29 × 5,354.20
  4. Step 4: Simplify right side
    13,672.66x = 109,805,383.78
  5. Step 5: Solve for x
    x = 109,805,383.78/13,672.66
  6. Step 6: Final answer
    x = 8,031.02

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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.