Home / 2,972.34-4,072.05-2,861.55

Finding the Fourth Proportional to 2,972.34, 4,072.05 and 2,861.55

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Solution

The fourth proportional to 2,972.34, 4,072.05 and 2,861.55 is: 3,920.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972.34 : 4,072.05 = 2,861.55 : x
  2. Step 2: Convert to fraction form
    2,972.34/4,072.05 = 2,861.55/x
  3. Step 3: Cross multiply
    2,972.34x = 4,072.05 × 2,861.55
  4. Step 4: Simplify right side
    2,972.34x = 11,652,374.68
  5. Step 5: Solve for x
    x = 11,652,374.68/2,972.34
  6. Step 6: Final answer
    x = 3,920.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.