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Finding the Fourth Proportional to 13,362, 18,439.80 and 7,773.36

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Solution

The fourth proportional to 13,362, 18,439.80 and 7,773.36 is: 10,727.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,362 : 18,439.80 = 7,773.36 : x
  2. Step 2: Convert to fraction form
    13,362/18,439.80 = 7,773.36/x
  3. Step 3: Cross multiply
    13,362x = 18,439.80 × 7,773.36
  4. Step 4: Simplify right side
    13,362x = 143,339,203.73
  5. Step 5: Solve for x
    x = 143,339,203.73/13,362
  6. Step 6: Final answer
    x = 10,727.38

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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.