Home / 7,988.52-11,981.16-2,143.76

Finding the Fourth Proportional to 7,988.52, 11,981.16 and 2,143.76

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Solution

The fourth proportional to 7,988.52, 11,981.16 and 2,143.76 is: 3,215.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.52 : 11,981.16 = 2,143.76 : x
  2. Step 2: Convert to fraction form
    7,988.52/11,981.16 = 2,143.76/x
  3. Step 3: Cross multiply
    7,988.52x = 11,981.16 × 2,143.76
  4. Step 4: Simplify right side
    7,988.52x = 25,684,731.56
  5. Step 5: Solve for x
    x = 25,684,731.56/7,988.52
  6. Step 6: Final answer
    x = 3,215.21

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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.