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Finding the Fourth Proportional to 18,402.20, 27,611.40 and 8,536.40

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Solution

The fourth proportional to 18,402.20, 27,611.40 and 8,536.40 is: 12,808.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,402.20 : 27,611.40 = 8,536.40 : x
  2. Step 2: Convert to fraction form
    18,402.20/27,611.40 = 8,536.40/x
  3. Step 3: Cross multiply
    18,402.20x = 27,611.40 × 8,536.40
  4. Step 4: Simplify right side
    18,402.20x = 235,701,954.96
  5. Step 5: Solve for x
    x = 235,701,954.96/18,402.20
  6. Step 6: Final answer
    x = 12,808.36

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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.