Home / 5,175.76-7,142.55-2,817.90

Finding the Fourth Proportional to 5,175.76, 7,142.55 and 2,817.90

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Solution

The fourth proportional to 5,175.76, 7,142.55 and 2,817.90 is: 3,888.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.76 : 7,142.55 = 2,817.90 : x
  2. Step 2: Convert to fraction form
    5,175.76/7,142.55 = 2,817.90/x
  3. Step 3: Cross multiply
    5,175.76x = 7,142.55 × 2,817.90
  4. Step 4: Simplify right side
    5,175.76x = 20,126,977.56
  5. Step 5: Solve for x
    x = 20,126,977.56/5,175.76
  6. Step 6: Final answer
    x = 3,888.70

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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.