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Finding the Fourth Proportional to 18,847.78, 28,233.96 and 11,347.18

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Solution

The fourth proportional to 18,847.78, 28,233.96 and 11,347.18 is: 16,998.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,847.78 : 28,233.96 = 11,347.18 : x
  2. Step 2: Convert to fraction form
    18,847.78/28,233.96 = 11,347.18/x
  3. Step 3: Cross multiply
    18,847.78x = 28,233.96 × 11,347.18
  4. Step 4: Simplify right side
    18,847.78x = 320,375,826.23
  5. Step 5: Solve for x
    x = 320,375,826.23/18,847.78
  6. Step 6: Final answer
    x = 16,998.07

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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.