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Finding the Fourth Proportional to 13,365.20, 18,443.88 and 7,396.88

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Solution

The fourth proportional to 13,365.20, 18,443.88 and 7,396.88 is: 10,207.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,365.20 : 18,443.88 = 7,396.88 : x
  2. Step 2: Convert to fraction form
    13,365.20/18,443.88 = 7,396.88/x
  3. Step 3: Cross multiply
    13,365.20x = 18,443.88 × 7,396.88
  4. Step 4: Simplify right side
    13,365.20x = 136,427,167.09
  5. Step 5: Solve for x
    x = 136,427,167.09/13,365.20
  6. Step 6: Final answer
    x = 10,207.64

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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.