Home / 5,239.44-7,857.63-2,118.78

Finding the Fourth Proportional to 5,239.44, 7,857.63 and 2,118.78

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Solution

The fourth proportional to 5,239.44, 7,857.63 and 2,118.78 is: 3,177.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,239.44 : 7,857.63 = 2,118.78 : x
  2. Step 2: Convert to fraction form
    5,239.44/7,857.63 = 2,118.78/x
  3. Step 3: Cross multiply
    5,239.44x = 7,857.63 × 2,118.78
  4. Step 4: Simplify right side
    5,239.44x = 16,648,589.29
  5. Step 5: Solve for x
    x = 16,648,589.29/5,239.44
  6. Step 6: Final answer
    x = 3,177.55

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1.5x scale

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.