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Finding the Fourth Proportional to 20,997.70, 30,232.80 and 20,997.70

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Solution

The fourth proportional to 20,997.70, 30,232.80 and 20,997.70 is: 30,232.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.70 : 30,232.80 = 20,997.70 : x
  2. Step 2: Convert to fraction form
    20,997.70/30,232.80 = 20,997.70/x
  3. Step 3: Cross multiply
    20,997.70x = 30,232.80 × 20,997.70
  4. Step 4: Simplify right side
    20,997.70x = 634,819,264.56
  5. Step 5: Solve for x
    x = 634,819,264.56/20,997.70
  6. Step 6: Final answer
    x = 30,232.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.