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Finding the Fourth Proportional to 13,679.31, 18,882.15 and 8,015.88

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Solution

The fourth proportional to 13,679.31, 18,882.15 and 8,015.88 is: 11,064.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.31 : 18,882.15 = 8,015.88 : x
  2. Step 2: Convert to fraction form
    13,679.31/18,882.15 = 8,015.88/x
  3. Step 3: Cross multiply
    13,679.31x = 18,882.15 × 8,015.88
  4. Step 4: Simplify right side
    13,679.31x = 151,357,048.54
  5. Step 5: Solve for x
    x = 151,357,048.54/13,679.31
  6. Step 6: Final answer
    x = 11,064.67

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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.