Home / 20,764.74-31,138.92-9,069.78

Finding the Fourth Proportional to 20,764.74, 31,138.92 and 9,069.78

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Solution

The fourth proportional to 20,764.74, 31,138.92 and 9,069.78 is: 13,601.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.74 : 31,138.92 = 9,069.78 : x
  2. Step 2: Convert to fraction form
    20,764.74/31,138.92 = 9,069.78/x
  3. Step 3: Cross multiply
    20,764.74x = 31,138.92 × 9,069.78
  4. Step 4: Simplify right side
    20,764.74x = 282,423,153.84
  5. Step 5: Solve for x
    x = 282,423,153.84/20,764.74
  6. Step 6: Final answer
    x = 13,601.09

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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.