Home / 3,712.80-5,123.75-2,220.86

Finding the Fourth Proportional to 3,712.80, 5,123.75 and 2,220.86

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Solution

The fourth proportional to 3,712.80, 5,123.75 and 2,220.86 is: 3,064.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.80 : 5,123.75 = 2,220.86 : x
  2. Step 2: Convert to fraction form
    3,712.80/5,123.75 = 2,220.86/x
  3. Step 3: Cross multiply
    3,712.80x = 5,123.75 × 2,220.86
  4. Step 4: Simplify right side
    3,712.80x = 11,379,094.70
  5. Step 5: Solve for x
    x = 11,379,094.70/3,712.80
  6. Step 6: Final answer
    x = 3,064.83

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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.