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Finding the Fourth Proportional to 18,450.90, 27,679.05 and 9,686.48

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Solution

The fourth proportional to 18,450.90, 27,679.05 and 9,686.48 is: 14,531.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,450.90 : 27,679.05 = 9,686.48 : x
  2. Step 2: Convert to fraction form
    18,450.90/27,679.05 = 9,686.48/x
  3. Step 3: Cross multiply
    18,450.90x = 27,679.05 × 9,686.48
  4. Step 4: Simplify right side
    18,450.90x = 268,112,425.85
  5. Step 5: Solve for x
    x = 268,112,425.85/18,450.90
  6. Step 6: Final answer
    x = 14,531.13

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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.