Home / 3,931.16-5,425.15-2,162.90

Finding the Fourth Proportional to 3,931.16, 5,425.15 and 2,162.90

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Solution

The fourth proportional to 3,931.16, 5,425.15 and 2,162.90 is: 2,984.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.16 : 5,425.15 = 2,162.90 : x
  2. Step 2: Convert to fraction form
    3,931.16/5,425.15 = 2,162.90/x
  3. Step 3: Cross multiply
    3,931.16x = 5,425.15 × 2,162.90
  4. Step 4: Simplify right side
    3,931.16x = 11,734,056.94
  5. Step 5: Solve for x
    x = 11,734,056.94/3,931.16
  6. Step 6: Final answer
    x = 2,984.88

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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.