Home / 7,988.73-11,981.72-2,143.97

Finding the Fourth Proportional to 7,988.73, 11,981.72 and 2,143.97

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Solution

The fourth proportional to 7,988.73, 11,981.72 and 2,143.97 is: 3,215.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.73 : 11,981.72 = 2,143.97 : x
  2. Step 2: Convert to fraction form
    7,988.73/11,981.72 = 2,143.97/x
  3. Step 3: Cross multiply
    7,988.73x = 11,981.72 × 2,143.97
  4. Step 4: Simplify right side
    7,988.73x = 25,688,438.61
  5. Step 5: Solve for x
    x = 25,688,438.61/7,988.73
  6. Step 6: Final answer
    x = 3,215.59

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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.