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Finding the Fourth Proportional to 20,662.59, 30,995.94 and 6,619.08

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Solution

The fourth proportional to 20,662.59, 30,995.94 and 6,619.08 is: 9,929.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.59 : 30,995.94 = 6,619.08 : x
  2. Step 2: Convert to fraction form
    20,662.59/30,995.94 = 6,619.08/x
  3. Step 3: Cross multiply
    20,662.59x = 30,995.94 × 6,619.08
  4. Step 4: Simplify right side
    20,662.59x = 205,164,606.54
  5. Step 5: Solve for x
    x = 205,164,606.54/20,662.59
  6. Step 6: Final answer
    x = 9,929.28

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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.