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Finding the Fourth Proportional to 18,469.81, 27,698.91 and 5,987.17

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Solution

The fourth proportional to 18,469.81, 27,698.91 and 5,987.17 is: 8,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,469.81 : 27,698.91 = 5,987.17 : x
  2. Step 2: Convert to fraction form
    18,469.81/27,698.91 = 5,987.17/x
  3. Step 3: Cross multiply
    18,469.81x = 27,698.91 × 5,987.17
  4. Step 4: Simplify right side
    18,469.81x = 165,838,082.98
  5. Step 5: Solve for x
    x = 165,838,082.98/18,469.81
  6. Step 6: Final answer
    x = 8,978.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.