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Finding the Fourth Proportional to 21,770.33, 32,670.05 and 7,919.33

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Solution

The fourth proportional to 21,770.33, 32,670.05 and 7,919.33 is: 11,884.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.33 : 32,670.05 = 7,919.33 : x
  2. Step 2: Convert to fraction form
    21,770.33/32,670.05 = 7,919.33/x
  3. Step 3: Cross multiply
    21,770.33x = 32,670.05 × 7,919.33
  4. Step 4: Simplify right side
    21,770.33x = 258,724,704.12
  5. Step 5: Solve for x
    x = 258,724,704.12/21,770.33
  6. Step 6: Final answer
    x = 11,884.28

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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.