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Finding the Fourth Proportional to 20,395.79, 30,596.92 and 8,709.11

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Solution

The fourth proportional to 20,395.79, 30,596.92 and 8,709.11 is: 13,065.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.79 : 30,596.92 = 8,709.11 : x
  2. Step 2: Convert to fraction form
    20,395.79/30,596.92 = 8,709.11/x
  3. Step 3: Cross multiply
    20,395.79x = 30,596.92 × 8,709.11
  4. Step 4: Simplify right side
    20,395.79x = 266,471,767.18
  5. Step 5: Solve for x
    x = 266,471,767.18/20,395.79
  6. Step 6: Final answer
    x = 13,065.04

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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.