Home / 8,689.31-13,033.78-2,115.53

Finding the Fourth Proportional to 8,689.31, 13,033.78 and 2,115.53

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Solution

The fourth proportional to 8,689.31, 13,033.78 and 2,115.53 is: 3,173.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.31 : 13,033.78 = 2,115.53 : x
  2. Step 2: Convert to fraction form
    8,689.31/13,033.78 = 2,115.53/x
  3. Step 3: Cross multiply
    8,689.31x = 13,033.78 × 2,115.53
  4. Step 4: Simplify right side
    8,689.31x = 27,573,352.60
  5. Step 5: Solve for x
    x = 27,573,352.60/8,689.31
  6. Step 6: Final answer
    x = 3,173.25

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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.