Home / 3,099.75-4,272.56-2,156.91

Finding the Fourth Proportional to 3,099.75, 4,272.56 and 2,156.91

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Solution

The fourth proportional to 3,099.75, 4,272.56 and 2,156.91 is: 2,972.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.75 : 4,272.56 = 2,156.91 : x
  2. Step 2: Convert to fraction form
    3,099.75/4,272.56 = 2,156.91/x
  3. Step 3: Cross multiply
    3,099.75x = 4,272.56 × 2,156.91
  4. Step 4: Simplify right side
    3,099.75x = 9,215,516.61
  5. Step 5: Solve for x
    x = 9,215,516.61/3,099.75
  6. Step 6: Final answer
    x = 2,972.99

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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.