Home / 8,478.32-12,717.81-3,212.78

Finding the Fourth Proportional to 8,478.32, 12,717.81 and 3,212.78

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Solution

The fourth proportional to 8,478.32, 12,717.81 and 3,212.78 is: 4,819.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.32 : 12,717.81 = 3,212.78 : x
  2. Step 2: Convert to fraction form
    8,478.32/12,717.81 = 3,212.78/x
  3. Step 3: Cross multiply
    8,478.32x = 12,717.81 × 3,212.78
  4. Step 4: Simplify right side
    8,478.32x = 40,859,462.02
  5. Step 5: Solve for x
    x = 40,859,462.02/8,478.32
  6. Step 6: Final answer
    x = 4,819.29

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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.