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Finding the Third Proportional to 9,315 and 20,477.81

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Solution

The third proportional to 9,315 and 20,477.81 is: 45,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315 : 20,477.81 = 20,477.81 : x
  2. Step 2: Convert to fraction form
    9,315/20,477.81 = 20,477.81/x
  3. Step 3: Cross multiply
    9,315x = 20,477.81 × 20,477.81
  4. Step 4: Simplify right side
    9,315x = 419,340,804.79
  5. Step 5: Solve for x
    x = 419,340,804.79/9,315
  6. Step 6: Final answer
    x = 45,017.80

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.