Home / 5,175.78-7,142.35-2,817.92

Finding the Fourth Proportional to 5,175.78, 7,142.35 and 2,817.92

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Solution

The fourth proportional to 5,175.78, 7,142.35 and 2,817.92 is: 3,888.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.78 : 7,142.35 = 2,817.92 : x
  2. Step 2: Convert to fraction form
    5,175.78/7,142.35 = 2,817.92/x
  3. Step 3: Cross multiply
    5,175.78x = 7,142.35 × 2,817.92
  4. Step 4: Simplify right side
    5,175.78x = 20,126,570.91
  5. Step 5: Solve for x
    x = 20,126,570.91/5,175.78
  6. Step 6: Final answer
    x = 3,888.61

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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.