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Finding the Fourth Proportional to 21,143,727.80, 31,644,732.90 and 21,143,727.80

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Solution

The fourth proportional to 21,143,727.80, 31,644,732.90 and 21,143,727.80 is: 31,644,732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,727.80 : 31,644,732.90 = 21,143,727.80 : x
  2. Step 2: Convert to fraction form
    21,143,727.80/31,644,732.90 = 21,143,727.80/x
  3. Step 3: Cross multiply
    21,143,727.80x = 31,644,732.90 × 21,143,727.80
  4. Step 4: Simplify right side
    21,143,727.80x = 669,087,618,741,304.62
  5. Step 5: Solve for x
    x = 669,087,618,741,304.62/21,143,727.80
  6. Step 6: Final answer
    x = 31,644,732.90

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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.