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Finding the Fourth Proportional to 8,754.10, 13,120.20 and 4,372.78

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Solution

The fourth proportional to 8,754.10, 13,120.20 and 4,372.78 is: 6,553.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,754.10 : 13,120.20 = 4,372.78 : x
  2. Step 2: Convert to fraction form
    8,754.10/13,120.20 = 4,372.78/x
  3. Step 3: Cross multiply
    8,754.10x = 13,120.20 × 4,372.78
  4. Step 4: Simplify right side
    8,754.10x = 57,371,748.16
  5. Step 5: Solve for x
    x = 57,371,748.16/8,754.10
  6. Step 6: Final answer
    x = 6,553.70

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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.