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Finding the Fourth Proportional to 20,717.80, 29,043.80 and 20,717.80

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Solution

The fourth proportional to 20,717.80, 29,043.80 and 20,717.80 is: 29,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.80 : 29,043.80 = 20,717.80 : x
  2. Step 2: Convert to fraction form
    20,717.80/29,043.80 = 20,717.80/x
  3. Step 3: Cross multiply
    20,717.80x = 29,043.80 × 20,717.80
  4. Step 4: Simplify right side
    20,717.80x = 601,723,639.64
  5. Step 5: Solve for x
    x = 601,723,639.64/20,717.80
  6. Step 6: Final answer
    x = 29,043.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.