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Finding the Fourth Proportional to 37,121.70, 55,657.95 and 20,489.70

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Solution

The fourth proportional to 37,121.70, 55,657.95 and 20,489.70 is: 30,720.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,121.70 : 55,657.95 = 20,489.70 : x
  2. Step 2: Convert to fraction form
    37,121.70/55,657.95 = 20,489.70/x
  3. Step 3: Cross multiply
    37,121.70x = 55,657.95 × 20,489.70
  4. Step 4: Simplify right side
    37,121.70x = 1,140,414,698.12
  5. Step 5: Solve for x
    x = 1,140,414,698.12/37,121.70
  6. Step 6: Final answer
    x = 30,720.97

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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.