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Finding the Fourth Proportional to 20,169.70, 30,254.55 and 10,305.70

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Solution

The fourth proportional to 20,169.70, 30,254.55 and 10,305.70 is: 15,458.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,169.70 : 30,254.55 = 10,305.70 : x
  2. Step 2: Convert to fraction form
    20,169.70/30,254.55 = 10,305.70/x
  3. Step 3: Cross multiply
    20,169.70x = 30,254.55 × 10,305.70
  4. Step 4: Simplify right side
    20,169.70x = 311,794,315.94
  5. Step 5: Solve for x
    x = 311,794,315.94/20,169.70
  6. Step 6: Final answer
    x = 15,458.55

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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.