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Finding the Fourth Proportional to 18,160.81, 25,062.16 and 10,990.64

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Solution

The fourth proportional to 18,160.81, 25,062.16 and 10,990.64 is: 15,167.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,160.81 : 25,062.16 = 10,990.64 : x
  2. Step 2: Convert to fraction form
    18,160.81/25,062.16 = 10,990.64/x
  3. Step 3: Cross multiply
    18,160.81x = 25,062.16 × 10,990.64
  4. Step 4: Simplify right side
    18,160.81x = 275,449,132.57
  5. Step 5: Solve for x
    x = 275,449,132.57/18,160.81
  6. Step 6: Final answer
    x = 15,167.23

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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.