Home / 8,124.91-12,190.30-3,191.81

Finding the Fourth Proportional to 8,124.91, 12,190.30 and 3,191.81

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Solution

The fourth proportional to 8,124.91, 12,190.30 and 3,191.81 is: 4,788.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,124.91 : 12,190.30 = 3,191.81 : x
  2. Step 2: Convert to fraction form
    8,124.91/12,190.30 = 3,191.81/x
  3. Step 3: Cross multiply
    8,124.91x = 12,190.30 × 3,191.81
  4. Step 4: Simplify right side
    8,124.91x = 38,909,052.51
  5. Step 5: Solve for x
    x = 38,909,052.51/8,124.91
  6. Step 6: Final answer
    x = 4,788.86

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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.