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Finding the Fourth Proportional to 18,465.38, 25,478.84 and 10,912.94

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Solution

The fourth proportional to 18,465.38, 25,478.84 and 10,912.94 is: 15,057.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,465.38 : 25,478.84 = 10,912.94 : x
  2. Step 2: Convert to fraction form
    18,465.38/25,478.84 = 10,912.94/x
  3. Step 3: Cross multiply
    18,465.38x = 25,478.84 × 10,912.94
  4. Step 4: Simplify right side
    18,465.38x = 278,049,052.19
  5. Step 5: Solve for x
    x = 278,049,052.19/18,465.38
  6. Step 6: Final answer
    x = 15,057.86

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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.