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Finding the Fourth Proportional to 18,314.64, 25,265.16 and 12,338.64

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Solution

The fourth proportional to 18,314.64, 25,265.16 and 12,338.64 is: 17,021.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,314.64 : 25,265.16 = 12,338.64 : x
  2. Step 2: Convert to fraction form
    18,314.64/25,265.16 = 12,338.64/x
  3. Step 3: Cross multiply
    18,314.64x = 25,265.16 × 12,338.64
  4. Step 4: Simplify right side
    18,314.64x = 311,737,713.78
  5. Step 5: Solve for x
    x = 311,737,713.78/18,314.64
  6. Step 6: Final answer
    x = 17,021.23

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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.