Home / 8,660.39-12,981.33-3,112.20

Finding the Fourth Proportional to 8,660.39, 12,981.33 and 3,112.20

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Solution

The fourth proportional to 8,660.39, 12,981.33 and 3,112.20 is: 4,664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.39 : 12,981.33 = 3,112.20 : x
  2. Step 2: Convert to fraction form
    8,660.39/12,981.33 = 3,112.20/x
  3. Step 3: Cross multiply
    8,660.39x = 12,981.33 × 3,112.20
  4. Step 4: Simplify right side
    8,660.39x = 40,400,495.23
  5. Step 5: Solve for x
    x = 40,400,495.23/8,660.39
  6. Step 6: Final answer
    x = 4,664.97

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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.