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Finding the Fourth Proportional to 20,717.60, 29,982.20 and 20,717.60

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Solution

The fourth proportional to 20,717.60, 29,982.20 and 20,717.60 is: 29,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.60 : 29,982.20 = 20,717.60 : x
  2. Step 2: Convert to fraction form
    20,717.60/29,982.20 = 20,717.60/x
  3. Step 3: Cross multiply
    20,717.60x = 29,982.20 × 20,717.60
  4. Step 4: Simplify right side
    20,717.60x = 621,159,226.72
  5. Step 5: Solve for x
    x = 621,159,226.72/20,717.60
  6. Step 6: Final answer
    x = 29,982.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.