Home / 5,210.80-7,190.82-2,972.60

Finding the Fourth Proportional to 5,210.80, 7,190.82 and 2,972.60

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Solution

The fourth proportional to 5,210.80, 7,190.82 and 2,972.60 is: 4,102.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,210.80 : 7,190.82 = 2,972.60 : x
  2. Step 2: Convert to fraction form
    5,210.80/7,190.82 = 2,972.60/x
  3. Step 3: Cross multiply
    5,210.80x = 7,190.82 × 2,972.60
  4. Step 4: Simplify right side
    5,210.80x = 21,375,431.53
  5. Step 5: Solve for x
    x = 21,375,431.53/5,210.80
  6. Step 6: Final answer
    x = 4,102.14

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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.