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Finding the Fourth Proportional to 43,425.60, 65,138.22 and 18,461.76

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Solution

The fourth proportional to 43,425.60, 65,138.22 and 18,461.76 is: 27,692.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,425.60 : 65,138.22 = 18,461.76 : x
  2. Step 2: Convert to fraction form
    43,425.60/65,138.22 = 18,461.76/x
  3. Step 3: Cross multiply
    43,425.60x = 65,138.22 × 18,461.76
  4. Step 4: Simplify right side
    43,425.60x = 1,202,566,184.47
  5. Step 5: Solve for x
    x = 1,202,566,184.47/43,425.60
  6. Step 6: Final answer
    x = 27,692.56

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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.