Home / 12,660.71-18,980.82-5,270.70

Finding the Fourth Proportional to 12,660.71, 18,980.82 and 5,270.70

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Solution

The fourth proportional to 12,660.71, 18,980.82 and 5,270.70 is: 7,901.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.71 : 18,980.82 = 5,270.70 : x
  2. Step 2: Convert to fraction form
    12,660.71/18,980.82 = 5,270.70/x
  3. Step 3: Cross multiply
    12,660.71x = 18,980.82 × 5,270.70
  4. Step 4: Simplify right side
    12,660.71x = 100,042,207.97
  5. Step 5: Solve for x
    x = 100,042,207.97/12,660.71
  6. Step 6: Final answer
    x = 7,901.78

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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.