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Finding the Third Proportional to 9,421.95 and 20,391.12

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Solution

The third proportional to 9,421.95 and 20,391.12 is: 44,130.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,421.95 : 20,391.12 = 20,391.12 : x
  2. Step 2: Convert to fraction form
    9,421.95/20,391.12 = 20,391.12/x
  3. Step 3: Cross multiply
    9,421.95x = 20,391.12 × 20,391.12
  4. Step 4: Simplify right side
    9,421.95x = 415,797,660.15
  5. Step 5: Solve for x
    x = 415,797,660.15/9,421.95
  6. Step 6: Final answer
    x = 44,130.77

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.