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Finding the Fourth Proportional to 13,681.31, 18,884.91 and 8,017.88

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Solution

The fourth proportional to 13,681.31, 18,884.91 and 8,017.88 is: 11,067.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.31 : 18,884.91 = 8,017.88 : x
  2. Step 2: Convert to fraction form
    13,681.31/18,884.91 = 8,017.88/x
  3. Step 3: Cross multiply
    13,681.31x = 18,884.91 × 8,017.88
  4. Step 4: Simplify right side
    13,681.31x = 151,416,942.19
  5. Step 5: Solve for x
    x = 151,416,942.19/13,681.31
  6. Step 6: Final answer
    x = 11,067.43

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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.