Home / 11,644.40-16,072.68-7,920.56

Finding the Fourth Proportional to 11,644.40, 16,072.68 and 7,920.56

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Solution

The fourth proportional to 11,644.40, 16,072.68 and 7,920.56 is: 10,932.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,644.40 : 16,072.68 = 7,920.56 : x
  2. Step 2: Convert to fraction form
    11,644.40/16,072.68 = 7,920.56/x
  3. Step 3: Cross multiply
    11,644.40x = 16,072.68 × 7,920.56
  4. Step 4: Simplify right side
    11,644.40x = 127,304,626.30
  5. Step 5: Solve for x
    x = 127,304,626.30/11,644.40
  6. Step 6: Final answer
    x = 10,932.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.