Home / 2,872.20-3,966.10-2,779.32

Finding the Fourth Proportional to 2,872.20, 3,966.10 and 2,779.32

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Solution

The fourth proportional to 2,872.20, 3,966.10 and 2,779.32 is: 3,837.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.20 : 3,966.10 = 2,779.32 : x
  2. Step 2: Convert to fraction form
    2,872.20/3,966.10 = 2,779.32/x
  3. Step 3: Cross multiply
    2,872.20x = 3,966.10 × 2,779.32
  4. Step 4: Simplify right side
    2,872.20x = 11,023,061.05
  5. Step 5: Solve for x
    x = 11,023,061.05/2,872.20
  6. Step 6: Final answer
    x = 3,837.85

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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.