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Finding the Fourth Proportional to 18,671.26, 27,990.07 and 6,816.76

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Solution

The fourth proportional to 18,671.26, 27,990.07 and 6,816.76 is: 10,219.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.26 : 27,990.07 = 6,816.76 : x
  2. Step 2: Convert to fraction form
    18,671.26/27,990.07 = 6,816.76/x
  3. Step 3: Cross multiply
    18,671.26x = 27,990.07 × 6,816.76
  4. Step 4: Simplify right side
    18,671.26x = 190,801,589.57
  5. Step 5: Solve for x
    x = 190,801,589.57/18,671.26
  6. Step 6: Final answer
    x = 10,219.00

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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.