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Finding the Fourth Proportional to 21,990.11, 32,972.88 and 7,195.06

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Solution

The fourth proportional to 21,990.11, 32,972.88 and 7,195.06 is: 10,788.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.11 : 32,972.88 = 7,195.06 : x
  2. Step 2: Convert to fraction form
    21,990.11/32,972.88 = 7,195.06/x
  3. Step 3: Cross multiply
    21,990.11x = 32,972.88 × 7,195.06
  4. Step 4: Simplify right side
    21,990.11x = 237,241,685.11
  5. Step 5: Solve for x
    x = 237,241,685.11/21,990.11
  6. Step 6: Final answer
    x = 10,788.56

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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.