Home / 5,175.80-7,142.50-2,818

Finding the Fourth Proportional to 5,175.80, 7,142.50 and 2,818

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Solution

The fourth proportional to 5,175.80, 7,142.50 and 2,818 is: 3,888.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.80 : 7,142.50 = 2,818 : x
  2. Step 2: Convert to fraction form
    5,175.80/7,142.50 = 2,818/x
  3. Step 3: Cross multiply
    5,175.80x = 7,142.50 × 2,818
  4. Step 4: Simplify right side
    5,175.80x = 20,127,565
  5. Step 5: Solve for x
    x = 20,127,565/5,175.80
  6. Step 6: Final answer
    x = 3,888.78

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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.