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Finding the Fourth Proportional to 18,711.40, 28,067.10 and 16,983.40

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Solution

The fourth proportional to 18,711.40, 28,067.10 and 16,983.40 is: 25,475.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.40 : 28,067.10 = 16,983.40 : x
  2. Step 2: Convert to fraction form
    18,711.40/28,067.10 = 16,983.40/x
  3. Step 3: Cross multiply
    18,711.40x = 28,067.10 × 16,983.40
  4. Step 4: Simplify right side
    18,711.40x = 476,674,786.14
  5. Step 5: Solve for x
    x = 476,674,786.14/18,711.40
  6. Step 6: Final answer
    x = 25,475.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.