Home / 5,177.65-7,145.16-2,819.78

Finding the Fourth Proportional to 5,177.65, 7,145.16 and 2,819.78

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Solution

The fourth proportional to 5,177.65, 7,145.16 and 2,819.78 is: 3,891.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,177.65 : 7,145.16 = 2,819.78 : x
  2. Step 2: Convert to fraction form
    5,177.65/7,145.16 = 2,819.78/x
  3. Step 3: Cross multiply
    5,177.65x = 7,145.16 × 2,819.78
  4. Step 4: Simplify right side
    5,177.65x = 20,147,779.26
  5. Step 5: Solve for x
    x = 20,147,779.26/5,177.65
  6. Step 6: Final answer
    x = 3,891.30

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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.