Home / 5,175.70-7,142.56-2,817.86

Finding the Fourth Proportional to 5,175.70, 7,142.56 and 2,817.86

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Solution

The fourth proportional to 5,175.70, 7,142.56 and 2,817.86 is: 3,888.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.70 : 7,142.56 = 2,817.86 : x
  2. Step 2: Convert to fraction form
    5,175.70/7,142.56 = 2,817.86/x
  3. Step 3: Cross multiply
    5,175.70x = 7,142.56 × 2,817.86
  4. Step 4: Simplify right side
    5,175.70x = 20,126,734.12
  5. Step 5: Solve for x
    x = 20,126,734.12/5,175.70
  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.