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Finding the Fourth Proportional to 12,945.20, 17,864.37 and 7,356.20

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Solution

The fourth proportional to 12,945.20, 17,864.37 and 7,356.20 is: 10,151.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.20 : 17,864.37 = 7,356.20 : x
  2. Step 2: Convert to fraction form
    12,945.20/17,864.37 = 7,356.20/x
  3. Step 3: Cross multiply
    12,945.20x = 17,864.37 × 7,356.20
  4. Step 4: Simplify right side
    12,945.20x = 131,413,789.27
  5. Step 5: Solve for x
    x = 131,413,789.27/12,945.20
  6. Step 6: Final answer
    x = 10,151.55

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.