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Finding the Fourth Proportional to 13,208.70, 18,227.89 and 7,240.35

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Solution

The fourth proportional to 13,208.70, 18,227.89 and 7,240.35 is: 9,991.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208.70 : 18,227.89 = 7,240.35 : x
  2. Step 2: Convert to fraction form
    13,208.70/18,227.89 = 7,240.35/x
  3. Step 3: Cross multiply
    13,208.70x = 18,227.89 × 7,240.35
  4. Step 4: Simplify right side
    13,208.70x = 131,976,303.36
  5. Step 5: Solve for x
    x = 131,976,303.36/13,208.70
  6. Step 6: Final answer
    x = 9,991.62

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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.