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Finding the Fourth Proportional to 18,820.75, 28,233.02 and 4,969.75

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Solution

The fourth proportional to 18,820.75, 28,233.02 and 4,969.75 is: 7,455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.75 : 28,233.02 = 4,969.75 : x
  2. Step 2: Convert to fraction form
    18,820.75/28,233.02 = 4,969.75/x
  3. Step 3: Cross multiply
    18,820.75x = 28,233.02 × 4,969.75
  4. Step 4: Simplify right side
    18,820.75x = 140,311,051.15
  5. Step 5: Solve for x
    x = 140,311,051.15/18,820.75
  6. Step 6: Final answer
    x = 7,455.13

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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.