Home / 5,251.47-7,871.76-2,785.65

Finding the Fourth Proportional to 5,251.47, 7,871.76 and 2,785.65

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Solution

The fourth proportional to 5,251.47, 7,871.76 and 2,785.65 is: 4,175.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,251.47 : 7,871.76 = 2,785.65 : x
  2. Step 2: Convert to fraction form
    5,251.47/7,871.76 = 2,785.65/x
  3. Step 3: Cross multiply
    5,251.47x = 7,871.76 × 2,785.65
  4. Step 4: Simplify right side
    5,251.47x = 21,927,968.24
  5. Step 5: Solve for x
    x = 21,927,968.24/5,251.47
  6. Step 6: Final answer
    x = 4,175.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.