Home / 5,211.15-7,190.72-2,972.90

Finding the Fourth Proportional to 5,211.15, 7,190.72 and 2,972.90

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Solution

The fourth proportional to 5,211.15, 7,190.72 and 2,972.90 is: 4,102.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.15 : 7,190.72 = 2,972.90 : x
  2. Step 2: Convert to fraction form
    5,211.15/7,190.72 = 2,972.90/x
  3. Step 3: Cross multiply
    5,211.15x = 7,190.72 × 2,972.90
  4. Step 4: Simplify right side
    5,211.15x = 21,377,251.82
  5. Step 5: Solve for x
    x = 21,377,251.82/5,211.15
  6. Step 6: Final answer
    x = 4,102.21

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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.