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Finding the Fourth Proportional to 18,869.19, 28,304.02 and 8,193.08

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Solution

The fourth proportional to 18,869.19, 28,304.02 and 8,193.08 is: 12,289.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.19 : 28,304.02 = 8,193.08 : x
  2. Step 2: Convert to fraction form
    18,869.19/28,304.02 = 8,193.08/x
  3. Step 3: Cross multiply
    18,869.19x = 28,304.02 × 8,193.08
  4. Step 4: Simplify right side
    18,869.19x = 231,897,181.18
  5. Step 5: Solve for x
    x = 231,897,181.18/18,869.19
  6. Step 6: Final answer
    x = 12,289.73

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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.