Home / 5,211.72-7,191.05-2,972.75

Finding the Fourth Proportional to 5,211.72, 7,191.05 and 2,972.75

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Solution

The fourth proportional to 5,211.72, 7,191.05 and 2,972.75 is: 4,101.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.72 : 7,191.05 = 2,972.75 : x
  2. Step 2: Convert to fraction form
    5,211.72/7,191.05 = 2,972.75/x
  3. Step 3: Cross multiply
    5,211.72x = 7,191.05 × 2,972.75
  4. Step 4: Simplify right side
    5,211.72x = 21,377,143.07
  5. Step 5: Solve for x
    x = 21,377,143.07/5,211.72
  6. Step 6: Final answer
    x = 4,101.74

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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.