Home / 8,392.05-12,580.20-3,125.79

Finding the Fourth Proportional to 8,392.05, 12,580.20 and 3,125.79

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Solution

The fourth proportional to 8,392.05, 12,580.20 and 3,125.79 is: 4,685.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,392.05 : 12,580.20 = 3,125.79 : x
  2. Step 2: Convert to fraction form
    8,392.05/12,580.20 = 3,125.79/x
  3. Step 3: Cross multiply
    8,392.05x = 12,580.20 × 3,125.79
  4. Step 4: Simplify right side
    8,392.05x = 39,323,063.36
  5. Step 5: Solve for x
    x = 39,323,063.36/8,392.05
  6. Step 6: Final answer
    x = 4,685.75

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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.