Home / 3,956.40-5,459.61-2,187.90

Finding the Fourth Proportional to 3,956.40, 5,459.61 and 2,187.90

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Solution

The fourth proportional to 3,956.40, 5,459.61 and 2,187.90 is: 3,019.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,956.40 : 5,459.61 = 2,187.90 : x
  2. Step 2: Convert to fraction form
    3,956.40/5,459.61 = 2,187.90/x
  3. Step 3: Cross multiply
    3,956.40x = 5,459.61 × 2,187.90
  4. Step 4: Simplify right side
    3,956.40x = 11,945,080.72
  5. Step 5: Solve for x
    x = 11,945,080.72/3,956.40
  6. Step 6: Final answer
    x = 3,019.18

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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.