Home / 2,916.75-4,377.34-2,138.72

Finding the Fourth Proportional to 2,916.75, 4,377.34 and 2,138.72

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Solution

The fourth proportional to 2,916.75, 4,377.34 and 2,138.72 is: 3,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916.75 : 4,377.34 = 2,138.72 : x
  2. Step 2: Convert to fraction form
    2,916.75/4,377.34 = 2,138.72/x
  3. Step 3: Cross multiply
    2,916.75x = 4,377.34 × 2,138.72
  4. Step 4: Simplify right side
    2,916.75x = 9,361,904.60
  5. Step 5: Solve for x
    x = 9,361,904.60/2,916.75
  6. Step 6: Final answer
    x = 3,209.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.