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Finding the Fourth Proportional to 20,605.08, 30,905.90 and 6,564.54

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Solution

The fourth proportional to 20,605.08, 30,905.90 and 6,564.54 is: 9,846.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.08 : 30,905.90 = 6,564.54 : x
  2. Step 2: Convert to fraction form
    20,605.08/30,905.90 = 6,564.54/x
  3. Step 3: Cross multiply
    20,605.08x = 30,905.90 × 6,564.54
  4. Step 4: Simplify right side
    20,605.08x = 202,883,161.40
  5. Step 5: Solve for x
    x = 202,883,161.40/20,605.08
  6. Step 6: Final answer
    x = 9,846.27

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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.