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Finding the Fourth Proportional to 20,030.52, 30,019.86 and 9,636.60

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Solution

The fourth proportional to 20,030.52, 30,019.86 and 9,636.60 is: 14,442.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,030.52 : 30,019.86 = 9,636.60 : x
  2. Step 2: Convert to fraction form
    20,030.52/30,019.86 = 9,636.60/x
  3. Step 3: Cross multiply
    20,030.52x = 30,019.86 × 9,636.60
  4. Step 4: Simplify right side
    20,030.52x = 289,289,382.88
  5. Step 5: Solve for x
    x = 289,289,382.88/20,030.52
  6. Step 6: Final answer
    x = 14,442.43

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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.