Home / 4,111.38-5,675.67-2,787.21

Finding the Fourth Proportional to 4,111.38, 5,675.67 and 2,787.21

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Solution

The fourth proportional to 4,111.38, 5,675.67 and 2,787.21 is: 3,847.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,111.38 : 5,675.67 = 2,787.21 : x
  2. Step 2: Convert to fraction form
    4,111.38/5,675.67 = 2,787.21/x
  3. Step 3: Cross multiply
    4,111.38x = 5,675.67 × 2,787.21
  4. Step 4: Simplify right side
    4,111.38x = 15,819,284.18
  5. Step 5: Solve for x
    x = 15,819,284.18/4,111.38
  6. Step 6: Final answer
    x = 3,847.68

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Half scale
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Double scale
Find fourth proportional to 4,112.38, 5,677.05 and 2,788.21
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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.