Home / 3,872.96-5,342.91-2,808.40

Finding the Fourth Proportional to 3,872.96, 5,342.91 and 2,808.40

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Solution

The fourth proportional to 3,872.96, 5,342.91 and 2,808.40 is: 3,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.96 : 5,342.91 = 2,808.40 : x
  2. Step 2: Convert to fraction form
    3,872.96/5,342.91 = 2,808.40/x
  3. Step 3: Cross multiply
    3,872.96x = 5,342.91 × 2,808.40
  4. Step 4: Simplify right side
    3,872.96x = 15,005,015.34
  5. Step 5: Solve for x
    x = 15,005,015.34/3,872.96
  6. Step 6: Final answer
    x = 3,874.30

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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.