Home / 8,211.20-12,309.48-3,015.86

Finding the Fourth Proportional to 8,211.20, 12,309.48 and 3,015.86

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Solution

The fourth proportional to 8,211.20, 12,309.48 and 3,015.86 is: 4,521.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.20 : 12,309.48 = 3,015.86 : x
  2. Step 2: Convert to fraction form
    8,211.20/12,309.48 = 3,015.86/x
  3. Step 3: Cross multiply
    8,211.20x = 12,309.48 × 3,015.86
  4. Step 4: Simplify right side
    8,211.20x = 37,123,606.81
  5. Step 5: Solve for x
    x = 37,123,606.81/8,211.20
  6. Step 6: Final answer
    x = 4,521.10

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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.