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Finding the Fourth Proportional to 13,315.88, 18,383.28 and 8,012

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Solution

The fourth proportional to 13,315.88, 18,383.28 and 8,012 is: 11,060.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.88 : 18,383.28 = 8,012 : x
  2. Step 2: Convert to fraction form
    13,315.88/18,383.28 = 8,012/x
  3. Step 3: Cross multiply
    13,315.88x = 18,383.28 × 8,012
  4. Step 4: Simplify right side
    13,315.88x = 147,286,839.36
  5. Step 5: Solve for x
    x = 147,286,839.36/13,315.88
  6. Step 6: Final answer
    x = 11,060.99

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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.