Home / 5,247.84-7,871.78-2,127.90

Finding the Fourth Proportional to 5,247.84, 7,871.78 and 2,127.90

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Solution

The fourth proportional to 5,247.84, 7,871.78 and 2,127.90 is: 3,191.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,247.84 : 7,871.78 = 2,127.90 : x
  2. Step 2: Convert to fraction form
    5,247.84/7,871.78 = 2,127.90/x
  3. Step 3: Cross multiply
    5,247.84x = 7,871.78 × 2,127.90
  4. Step 4: Simplify right side
    5,247.84x = 16,750,360.66
  5. Step 5: Solve for x
    x = 16,750,360.66/5,247.84
  6. Step 6: Final answer
    x = 3,191.86

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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.