Home / 12,747.20-19,122.60-3,981.20

Finding the Fourth Proportional to 12,747.20, 19,122.60 and 3,981.20

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Solution

The fourth proportional to 12,747.20, 19,122.60 and 3,981.20 is: 5,972.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,747.20 : 19,122.60 = 3,981.20 : x
  2. Step 2: Convert to fraction form
    12,747.20/19,122.60 = 3,981.20/x
  3. Step 3: Cross multiply
    12,747.20x = 19,122.60 × 3,981.20
  4. Step 4: Simplify right side
    12,747.20x = 76,130,895.12
  5. Step 5: Solve for x
    x = 76,130,895.12/12,747.20
  6. Step 6: Final answer
    x = 5,972.36

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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.