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Finding the Fourth Proportional to 18,973.70, 28,464.12 and 7,286.02

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Solution

The fourth proportional to 18,973.70, 28,464.12 and 7,286.02 is: 10,930.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.70 : 28,464.12 = 7,286.02 : x
  2. Step 2: Convert to fraction form
    18,973.70/28,464.12 = 7,286.02/x
  3. Step 3: Cross multiply
    18,973.70x = 28,464.12 × 7,286.02
  4. Step 4: Simplify right side
    18,973.70x = 207,390,147.60
  5. Step 5: Solve for x
    x = 207,390,147.60/18,973.70
  6. Step 6: Final answer
    x = 10,930.40

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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.