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Finding the Fourth Proportional to 8,689.80, 13,037.90 and 3,496.20

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Solution

The fourth proportional to 8,689.80, 13,037.90 and 3,496.20 is: 5,245.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.80 : 13,037.90 = 3,496.20 : x
  2. Step 2: Convert to fraction form
    8,689.80/13,037.90 = 3,496.20/x
  3. Step 3: Cross multiply
    8,689.80x = 13,037.90 × 3,496.20
  4. Step 4: Simplify right side
    8,689.80x = 45,583,105.98
  5. Step 5: Solve for x
    x = 45,583,105.98/8,689.80
  6. Step 6: Final answer
    x = 5,245.59

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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.