Home / 8,688.85-13,033.17-2,115.05

Finding the Fourth Proportional to 8,688.85, 13,033.17 and 2,115.05

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Solution

The fourth proportional to 8,688.85, 13,033.17 and 2,115.05 is: 3,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.85 : 13,033.17 = 2,115.05 : x
  2. Step 2: Convert to fraction form
    8,688.85/13,033.17 = 2,115.05/x
  3. Step 3: Cross multiply
    8,688.85x = 13,033.17 × 2,115.05
  4. Step 4: Simplify right side
    8,688.85x = 27,565,806.21
  5. Step 5: Solve for x
    x = 27,565,806.21/8,688.85
  6. Step 6: Final answer
    x = 3,172.55

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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.