Home / 12,747.20-19,119.36-3,512

Finding the Fourth Proportional to 12,747.20, 19,119.36 and 3,512

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Solution

The fourth proportional to 12,747.20, 19,119.36 and 3,512 is: 5,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,747.20 : 19,119.36 = 3,512 : x
  2. Step 2: Convert to fraction form
    12,747.20/19,119.36 = 3,512/x
  3. Step 3: Cross multiply
    12,747.20x = 19,119.36 × 3,512
  4. Step 4: Simplify right side
    12,747.20x = 67,147,192.32
  5. Step 5: Solve for x
    x = 67,147,192.32/12,747.20
  6. Step 6: Final answer
    x = 5,267.60

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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.