Home / 21,972.80-32,958.40-8,821.60

Finding the Fourth Proportional to 21,972.80, 32,958.40 and 8,821.60

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Solution

The fourth proportional to 21,972.80, 32,958.40 and 8,821.60 is: 13,232.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.80 : 32,958.40 = 8,821.60 : x
  2. Step 2: Convert to fraction form
    21,972.80/32,958.40 = 8,821.60/x
  3. Step 3: Cross multiply
    21,972.80x = 32,958.40 × 8,821.60
  4. Step 4: Simplify right side
    21,972.80x = 290,745,821.44
  5. Step 5: Solve for x
    x = 290,745,821.44/21,972.80
  6. Step 6: Final answer
    x = 13,232.08

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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.