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Finding the Fourth Proportional to 18,093.40, 27,142.80 and 6,405.70

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Solution

The fourth proportional to 18,093.40, 27,142.80 and 6,405.70 is: 9,609.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,093.40 : 27,142.80 = 6,405.70 : x
  2. Step 2: Convert to fraction form
    18,093.40/27,142.80 = 6,405.70/x
  3. Step 3: Cross multiply
    18,093.40x = 27,142.80 × 6,405.70
  4. Step 4: Simplify right side
    18,093.40x = 173,868,633.96
  5. Step 5: Solve for x
    x = 173,868,633.96/18,093.40
  6. Step 6: Final answer
    x = 9,609.51

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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.