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Finding the Fourth Proportional to 28,163.40, 42,250.20 and 13,372.20

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Solution

The fourth proportional to 28,163.40, 42,250.20 and 13,372.20 is: 20,060.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.40 : 42,250.20 = 13,372.20 : x
  2. Step 2: Convert to fraction form
    28,163.40/42,250.20 = 13,372.20/x
  3. Step 3: Cross multiply
    28,163.40x = 42,250.20 × 13,372.20
  4. Step 4: Simplify right side
    28,163.40x = 564,978,124.44
  5. Step 5: Solve for x
    x = 564,978,124.44/28,163.40
  6. Step 6: Final answer
    x = 20,060.72

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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.