Home / 3,100.16-4,278.96-1,920.52

Finding the Fourth Proportional to 3,100.16, 4,278.96 and 1,920.52

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Solution

The fourth proportional to 3,100.16, 4,278.96 and 1,920.52 is: 2,650.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.16 : 4,278.96 = 1,920.52 : x
  2. Step 2: Convert to fraction form
    3,100.16/4,278.96 = 1,920.52/x
  3. Step 3: Cross multiply
    3,100.16x = 4,278.96 × 1,920.52
  4. Step 4: Simplify right side
    3,100.16x = 8,217,828.26
  5. Step 5: Solve for x
    x = 8,217,828.26/3,100.16
  6. Step 6: Final answer
    x = 2,650.78

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.