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Finding the Fourth Proportional to 18,221.10, 27,343.80 and 8,355.30

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Solution

The fourth proportional to 18,221.10, 27,343.80 and 8,355.30 is: 12,538.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.10 : 27,343.80 = 8,355.30 : x
  2. Step 2: Convert to fraction form
    18,221.10/27,343.80 = 8,355.30/x
  3. Step 3: Cross multiply
    18,221.10x = 27,343.80 × 8,355.30
  4. Step 4: Simplify right side
    18,221.10x = 228,465,652.14
  5. Step 5: Solve for x
    x = 228,465,652.14/18,221.10
  6. Step 6: Final answer
    x = 12,538.52

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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.