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Finding the Fourth Proportional to 20,999.70, 27,740.34 and 20,999.70

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Solution

The fourth proportional to 20,999.70, 27,740.34 and 20,999.70 is: 27,740.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.70 : 27,740.34 = 20,999.70 : x
  2. Step 2: Convert to fraction form
    20,999.70/27,740.34 = 20,999.70/x
  3. Step 3: Cross multiply
    20,999.70x = 27,740.34 × 20,999.70
  4. Step 4: Simplify right side
    20,999.70x = 582,538,817.90
  5. Step 5: Solve for x
    x = 582,538,817.90/20,999.70
  6. Step 6: Final answer
    x = 27,740.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.