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Finding the Fourth Proportional to 21,770.28, 32,669.99 and 7,919.28

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Solution

The fourth proportional to 21,770.28, 32,669.99 and 7,919.28 is: 11,884.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.28 : 32,669.99 = 7,919.28 : x
  2. Step 2: Convert to fraction form
    21,770.28/32,669.99 = 7,919.28/x
  3. Step 3: Cross multiply
    21,770.28x = 32,669.99 × 7,919.28
  4. Step 4: Simplify right side
    21,770.28x = 258,722,860.28
  5. Step 5: Solve for x
    x = 258,722,860.28/21,770.28
  6. Step 6: Final answer
    x = 11,884.22

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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.