Home / 3,872.40-5,343.80-2,103.96

Finding the Fourth Proportional to 3,872.40, 5,343.80 and 2,103.96

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Solution

The fourth proportional to 3,872.40, 5,343.80 and 2,103.96 is: 2,903.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.40 : 5,343.80 = 2,103.96 : x
  2. Step 2: Convert to fraction form
    3,872.40/5,343.80 = 2,103.96/x
  3. Step 3: Cross multiply
    3,872.40x = 5,343.80 × 2,103.96
  4. Step 4: Simplify right side
    3,872.40x = 11,243,141.45
  5. Step 5: Solve for x
    x = 11,243,141.45/3,872.40
  6. Step 6: Final answer
    x = 2,903.40

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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.