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Finding the Fourth Proportional to 15,083.65, 20,801.81 and 9,418.92

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Solution

The fourth proportional to 15,083.65, 20,801.81 and 9,418.92 is: 12,989.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,083.65 : 20,801.81 = 9,418.92 : x
  2. Step 2: Convert to fraction form
    15,083.65/20,801.81 = 9,418.92/x
  3. Step 3: Cross multiply
    15,083.65x = 20,801.81 × 9,418.92
  4. Step 4: Simplify right side
    15,083.65x = 195,930,584.25
  5. Step 5: Solve for x
    x = 195,930,584.25/15,083.65
  6. Step 6: Final answer
    x = 12,989.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.