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Finding the Fourth Proportional to 18,021.60, 27,016.74 and 8,656.92

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Solution

The fourth proportional to 18,021.60, 27,016.74 and 8,656.92 is: 12,977.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.60 : 27,016.74 = 8,656.92 : x
  2. Step 2: Convert to fraction form
    18,021.60/27,016.74 = 8,656.92/x
  3. Step 3: Cross multiply
    18,021.60x = 27,016.74 × 8,656.92
  4. Step 4: Simplify right side
    18,021.60x = 233,881,756.84
  5. Step 5: Solve for x
    x = 233,881,756.84/18,021.60
  6. Step 6: Final answer
    x = 12,977.86

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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.