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Finding the Fourth Proportional to 18,755.48, 28,119.16 and 11,358.12

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Solution

The fourth proportional to 18,755.48, 28,119.16 and 11,358.12 is: 17,028.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.48 : 28,119.16 = 11,358.12 : x
  2. Step 2: Convert to fraction form
    18,755.48/28,119.16 = 11,358.12/x
  3. Step 3: Cross multiply
    18,755.48x = 28,119.16 × 11,358.12
  4. Step 4: Simplify right side
    18,755.48x = 319,380,793.58
  5. Step 5: Solve for x
    x = 319,380,793.58/18,755.48
  6. Step 6: Final answer
    x = 17,028.67

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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.