Home / 5,175.20-7,141.56-2,817.20

Finding the Fourth Proportional to 5,175.20, 7,141.56 and 2,817.20

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Solution

The fourth proportional to 5,175.20, 7,141.56 and 2,817.20 is: 3,887.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.20 : 7,141.56 = 2,817.20 : x
  2. Step 2: Convert to fraction form
    5,175.20/7,141.56 = 2,817.20/x
  3. Step 3: Cross multiply
    5,175.20x = 7,141.56 × 2,817.20
  4. Step 4: Simplify right side
    5,175.20x = 20,119,202.83
  5. Step 5: Solve for x
    x = 20,119,202.83/5,175.20
  6. Step 6: Final answer
    x = 3,887.62

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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.