Home / 42,747.72-64,121.88-13,165.80

Finding the Fourth Proportional to 42,747.72, 64,121.88 and 13,165.80

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Solution

The fourth proportional to 42,747.72, 64,121.88 and 13,165.80 is: 19,748.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,747.72 : 64,121.88 = 13,165.80 : x
  2. Step 2: Convert to fraction form
    42,747.72/64,121.88 = 13,165.80/x
  3. Step 3: Cross multiply
    42,747.72x = 64,121.88 × 13,165.80
  4. Step 4: Simplify right side
    42,747.72x = 844,215,847.70
  5. Step 5: Solve for x
    x = 844,215,847.70/42,747.72
  6. Step 6: Final answer
    x = 19,748.79

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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.