Home / 2,745.12-3,787.28-2,115.84

Finding the Fourth Proportional to 2,745.12, 3,787.28 and 2,115.84

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Solution

The fourth proportional to 2,745.12, 3,787.28 and 2,115.84 is: 2,919.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,745.12 : 3,787.28 = 2,115.84 : x
  2. Step 2: Convert to fraction form
    2,745.12/3,787.28 = 2,115.84/x
  3. Step 3: Cross multiply
    2,745.12x = 3,787.28 × 2,115.84
  4. Step 4: Simplify right side
    2,745.12x = 8,013,278.52
  5. Step 5: Solve for x
    x = 8,013,278.52/2,745.12
  6. Step 6: Final answer
    x = 2,919.10

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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.