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Finding the Fourth Proportional to 8,665.18, 11,947.09 and 7,231.59

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Solution

The fourth proportional to 8,665.18, 11,947.09 and 7,231.59 is: 9,970.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.18 : 11,947.09 = 7,231.59 : x
  2. Step 2: Convert to fraction form
    8,665.18/11,947.09 = 7,231.59/x
  3. Step 3: Cross multiply
    8,665.18x = 11,947.09 × 7,231.59
  4. Step 4: Simplify right side
    8,665.18x = 86,396,456.57
  5. Step 5: Solve for x
    x = 86,396,456.57/8,665.18
  6. Step 6: Final answer
    x = 9,970.54

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1.5x scale

Why These Related Problems?

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