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Finding the Fourth Proportional to 20,663.13, 30,996.99 and 6,619.86

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Solution

The fourth proportional to 20,663.13, 30,996.99 and 6,619.86 is: 9,930.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.13 : 30,996.99 = 6,619.86 : x
  2. Step 2: Convert to fraction form
    20,663.13/30,996.99 = 6,619.86/x
  3. Step 3: Cross multiply
    20,663.13x = 30,996.99 × 6,619.86
  4. Step 4: Simplify right side
    20,663.13x = 205,195,734.22
  5. Step 5: Solve for x
    x = 205,195,734.22/20,663.13
  6. Step 6: Final answer
    x = 9,930.53

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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.