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Finding the Fourth Proportional to 20,019, 30,039.21 and 12,997.37

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Solution

The fourth proportional to 20,019, 30,039.21 and 12,997.37 is: 19,503.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019 : 30,039.21 = 12,997.37 : x
  2. Step 2: Convert to fraction form
    20,019/30,039.21 = 12,997.37/x
  3. Step 3: Cross multiply
    20,019x = 30,039.21 × 12,997.37
  4. Step 4: Simplify right side
    20,019x = 390,430,726.88
  5. Step 5: Solve for x
    x = 390,430,726.88/20,019
  6. Step 6: Final answer
    x = 19,503.01

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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.