Home / 8,621.16-12,929.38-2,379.68

Finding the Fourth Proportional to 8,621.16, 12,929.38 and 2,379.68

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Solution

The fourth proportional to 8,621.16, 12,929.38 and 2,379.68 is: 3,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.16 : 12,929.38 = 2,379.68 : x
  2. Step 2: Convert to fraction form
    8,621.16/12,929.38 = 2,379.68/x
  3. Step 3: Cross multiply
    8,621.16x = 12,929.38 × 2,379.68
  4. Step 4: Simplify right side
    8,621.16x = 30,767,787.00
  5. Step 5: Solve for x
    x = 30,767,787.00/8,621.16
  6. Step 6: Final answer
    x = 3,568.87

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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.