Home / 42,775.20-64,171.96-12,791.76

Finding the Fourth Proportional to 42,775.20, 64,171.96 and 12,791.76

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Solution

The fourth proportional to 42,775.20, 64,171.96 and 12,791.76 is: 19,190.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,775.20 : 64,171.96 = 12,791.76 : x
  2. Step 2: Convert to fraction form
    42,775.20/64,171.96 = 12,791.76/x
  3. Step 3: Cross multiply
    42,775.20x = 64,171.96 × 12,791.76
  4. Step 4: Simplify right side
    42,775.20x = 820,872,311.05
  5. Step 5: Solve for x
    x = 820,872,311.05/42,775.20
  6. Step 6: Final answer
    x = 19,190.38

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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.