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Finding the Fourth Proportional to 18,911.33, 28,363.64 and 7,062.45

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Solution

The fourth proportional to 18,911.33, 28,363.64 and 7,062.45 is: 10,592.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.33 : 28,363.64 = 7,062.45 : x
  2. Step 2: Convert to fraction form
    18,911.33/28,363.64 = 7,062.45/x
  3. Step 3: Cross multiply
    18,911.33x = 28,363.64 × 7,062.45
  4. Step 4: Simplify right side
    18,911.33x = 200,316,789.32
  5. Step 5: Solve for x
    x = 200,316,789.32/18,911.33
  6. Step 6: Final answer
    x = 10,592.42

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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.