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Finding the Fourth Proportional to 21,990.39, 32,985.60 and 6,195.42

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Solution

The fourth proportional to 21,990.39, 32,985.60 and 6,195.42 is: 9,293.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.39 : 32,985.60 = 6,195.42 : x
  2. Step 2: Convert to fraction form
    21,990.39/32,985.60 = 6,195.42/x
  3. Step 3: Cross multiply
    21,990.39x = 32,985.60 × 6,195.42
  4. Step 4: Simplify right side
    21,990.39x = 204,359,622.72
  5. Step 5: Solve for x
    x = 204,359,622.72/21,990.39
  6. Step 6: Final answer
    x = 9,293.13

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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.