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Finding the Fourth Proportional to 20,137.80, 30,170.70 and 9,726.60

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Solution

The fourth proportional to 20,137.80, 30,170.70 and 9,726.60 is: 14,572.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.80 : 30,170.70 = 9,726.60 : x
  2. Step 2: Convert to fraction form
    20,137.80/30,170.70 = 9,726.60/x
  3. Step 3: Cross multiply
    20,137.80x = 30,170.70 × 9,726.60
  4. Step 4: Simplify right side
    20,137.80x = 293,458,330.62
  5. Step 5: Solve for x
    x = 293,458,330.62/20,137.80
  6. Step 6: Final answer
    x = 14,572.51

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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.