Home / 3,712.75-5,123.44-2,221.49

Finding the Fourth Proportional to 3,712.75, 5,123.44 and 2,221.49

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Solution

The fourth proportional to 3,712.75, 5,123.44 and 2,221.49 is: 3,065.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.75 : 5,123.44 = 2,221.49 : x
  2. Step 2: Convert to fraction form
    3,712.75/5,123.44 = 2,221.49/x
  3. Step 3: Cross multiply
    3,712.75x = 5,123.44 × 2,221.49
  4. Step 4: Simplify right side
    3,712.75x = 11,381,670.73
  5. Step 5: Solve for x
    x = 11,381,670.73/3,712.75
  6. Step 6: Final answer
    x = 3,065.56

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Half scale
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Double scale
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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.