Home / 3,123.82-4,685.73-1,976.86

Finding the Fourth Proportional to 3,123.82, 4,685.73 and 1,976.86

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Solution

The fourth proportional to 3,123.82, 4,685.73 and 1,976.86 is: 2,965.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.82 : 4,685.73 = 1,976.86 : x
  2. Step 2: Convert to fraction form
    3,123.82/4,685.73 = 1,976.86/x
  3. Step 3: Cross multiply
    3,123.82x = 4,685.73 × 1,976.86
  4. Step 4: Simplify right side
    3,123.82x = 9,263,032.21
  5. Step 5: Solve for x
    x = 9,263,032.21/3,123.82
  6. Step 6: Final answer
    x = 2,965.29

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Double scale
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Similar ratio
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1.5x scale

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.