Home / 5,175.78-7,142.36-2,817.91

Finding the Fourth Proportional to 5,175.78, 7,142.36 and 2,817.91

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Solution

The fourth proportional to 5,175.78, 7,142.36 and 2,817.91 is: 3,888.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.78 : 7,142.36 = 2,817.91 : x
  2. Step 2: Convert to fraction form
    5,175.78/7,142.36 = 2,817.91/x
  3. Step 3: Cross multiply
    5,175.78x = 7,142.36 × 2,817.91
  4. Step 4: Simplify right side
    5,175.78x = 20,126,513.58
  5. Step 5: Solve for x
    x = 20,126,513.58/5,175.78
  6. Step 6: Final answer
    x = 3,888.60

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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.