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Finding the Fourth Proportional to 20,563.38, 30,845.07 and 18,958.37

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Solution

The fourth proportional to 20,563.38, 30,845.07 and 18,958.37 is: 28,437.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.38 : 30,845.07 = 18,958.37 : x
  2. Step 2: Convert to fraction form
    20,563.38/30,845.07 = 18,958.37/x
  3. Step 3: Cross multiply
    20,563.38x = 30,845.07 × 18,958.37
  4. Step 4: Simplify right side
    20,563.38x = 584,772,095.51
  5. Step 5: Solve for x
    x = 584,772,095.51/20,563.38
  6. Step 6: Final answer
    x = 28,437.55

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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.