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Finding the Fourth Proportional to 13,320.88, 18,390.18 and 8,017

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Solution

The fourth proportional to 13,320.88, 18,390.18 and 8,017 is: 11,067.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.88 : 18,390.18 = 8,017 : x
  2. Step 2: Convert to fraction form
    13,320.88/18,390.18 = 8,017/x
  3. Step 3: Cross multiply
    13,320.88x = 18,390.18 × 8,017
  4. Step 4: Simplify right side
    13,320.88x = 147,434,073.06
  5. Step 5: Solve for x
    x = 147,434,073.06/13,320.88
  6. Step 6: Final answer
    x = 11,067.89

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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.