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Finding the Fourth Proportional to 15,169.67, 20,921.05 and 9,862.55

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Solution

The fourth proportional to 15,169.67, 20,921.05 and 9,862.55 is: 13,601.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,169.67 : 20,921.05 = 9,862.55 : x
  2. Step 2: Convert to fraction form
    15,169.67/20,921.05 = 9,862.55/x
  3. Step 3: Cross multiply
    15,169.67x = 20,921.05 × 9,862.55
  4. Step 4: Simplify right side
    15,169.67x = 206,334,901.68
  5. Step 5: Solve for x
    x = 206,334,901.68/15,169.67
  6. Step 6: Final answer
    x = 13,601.81

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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.