Home / 7,981.56-11,972.20-2,509.56

Finding the Fourth Proportional to 7,981.56, 11,972.20 and 2,509.56

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Solution

The fourth proportional to 7,981.56, 11,972.20 and 2,509.56 is: 3,764.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.56 : 11,972.20 = 2,509.56 : x
  2. Step 2: Convert to fraction form
    7,981.56/11,972.20 = 2,509.56/x
  3. Step 3: Cross multiply
    7,981.56x = 11,972.20 × 2,509.56
  4. Step 4: Simplify right side
    7,981.56x = 30,044,954.23
  5. Step 5: Solve for x
    x = 30,044,954.23/7,981.56
  6. Step 6: Final answer
    x = 3,764.30

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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.