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Finding the Fourth Proportional to 18,219.85, 27,341.93 and 8,354.05

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Solution

The fourth proportional to 18,219.85, 27,341.93 and 8,354.05 is: 12,536.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.85 : 27,341.93 = 8,354.05 : x
  2. Step 2: Convert to fraction form
    18,219.85/27,341.93 = 8,354.05/x
  3. Step 3: Cross multiply
    18,219.85x = 27,341.93 × 8,354.05
  4. Step 4: Simplify right side
    18,219.85x = 228,415,808.55
  5. Step 5: Solve for x
    x = 228,415,808.55/18,219.85
  6. Step 6: Final answer
    x = 12,536.65

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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.