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Finding the Fourth Proportional to 18,891.74, 28,343.08 and 7,205.88

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Solution

The fourth proportional to 18,891.74, 28,343.08 and 7,205.88 is: 10,810.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.74 : 28,343.08 = 7,205.88 : x
  2. Step 2: Convert to fraction form
    18,891.74/28,343.08 = 7,205.88/x
  3. Step 3: Cross multiply
    18,891.74x = 28,343.08 × 7,205.88
  4. Step 4: Simplify right side
    18,891.74x = 204,236,833.31
  5. Step 5: Solve for x
    x = 204,236,833.31/18,891.74
  6. Step 6: Final answer
    x = 10,810.91

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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.