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Finding the Fourth Proportional to 20,423.96, 30,614.15 and 11,639.96

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Solution

The fourth proportional to 20,423.96, 30,614.15 and 11,639.96 is: 17,447.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.96 : 30,614.15 = 11,639.96 : x
  2. Step 2: Convert to fraction form
    20,423.96/30,614.15 = 11,639.96/x
  3. Step 3: Cross multiply
    20,423.96x = 30,614.15 × 11,639.96
  4. Step 4: Simplify right side
    20,423.96x = 356,347,357.46
  5. Step 5: Solve for x
    x = 356,347,357.46/20,423.96
  6. Step 6: Final answer
    x = 17,447.52

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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.