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Finding the Fourth Proportional to 20,465.79, 30,665.89 and 18,497.49

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Solution

The fourth proportional to 20,465.79, 30,665.89 and 18,497.49 is: 27,716.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.79 : 30,665.89 = 18,497.49 : x
  2. Step 2: Convert to fraction form
    20,465.79/30,665.89 = 18,497.49/x
  3. Step 3: Cross multiply
    20,465.79x = 30,665.89 × 18,497.49
  4. Step 4: Simplify right side
    20,465.79x = 567,241,993.62
  5. Step 5: Solve for x
    x = 567,241,993.62/20,465.79
  6. Step 6: Final answer
    x = 27,716.59

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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.