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Finding the Fourth Proportional to 20,650.73, 30,978.16 and 6,607.22

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Solution

The fourth proportional to 20,650.73, 30,978.16 and 6,607.22 is: 9,911.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.73 : 30,978.16 = 6,607.22 : x
  2. Step 2: Convert to fraction form
    20,650.73/30,978.16 = 6,607.22/x
  3. Step 3: Cross multiply
    20,650.73x = 30,978.16 × 6,607.22
  4. Step 4: Simplify right side
    20,650.73x = 204,679,518.32
  5. Step 5: Solve for x
    x = 204,679,518.32/20,650.73
  6. Step 6: Final answer
    x = 9,911.49

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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.