Home / 7,981.65-11,972.48-3,820.68

Finding the Fourth Proportional to 7,981.65, 11,972.48 and 3,820.68

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Solution

The fourth proportional to 7,981.65, 11,972.48 and 3,820.68 is: 5,731.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.65 : 11,972.48 = 3,820.68 : x
  2. Step 2: Convert to fraction form
    7,981.65/11,972.48 = 3,820.68/x
  3. Step 3: Cross multiply
    7,981.65x = 11,972.48 × 3,820.68
  4. Step 4: Simplify right side
    7,981.65x = 45,743,014.89
  5. Step 5: Solve for x
    x = 45,743,014.89/7,981.65
  6. Step 6: Final answer
    x = 5,731.02

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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.