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Finding the Fourth Proportional to 18,106.81, 27,103.39 and 12,451.48

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Solution

The fourth proportional to 18,106.81, 27,103.39 and 12,451.48 is: 18,638.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,106.81 : 27,103.39 = 12,451.48 : x
  2. Step 2: Convert to fraction form
    18,106.81/27,103.39 = 12,451.48/x
  3. Step 3: Cross multiply
    18,106.81x = 27,103.39 × 12,451.48
  4. Step 4: Simplify right side
    18,106.81x = 337,477,318.52
  5. Step 5: Solve for x
    x = 337,477,318.52/18,106.81
  6. Step 6: Final answer
    x = 18,638.14

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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.