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Finding the Fourth Proportional to 13,308.80, 18,366 and 7,340.32

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Solution

The fourth proportional to 13,308.80, 18,366 and 7,340.32 is: 10,129.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308.80 : 18,366 = 7,340.32 : x
  2. Step 2: Convert to fraction form
    13,308.80/18,366 = 7,340.32/x
  3. Step 3: Cross multiply
    13,308.80x = 18,366 × 7,340.32
  4. Step 4: Simplify right side
    13,308.80x = 134,812,317.12
  5. Step 5: Solve for x
    x = 134,812,317.12/13,308.80
  6. Step 6: Final answer
    x = 10,129.56

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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.