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Finding the Fourth Proportional to 21,143,722.30, 31,644,724.65 and 21,143,722.30

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Solution

The fourth proportional to 21,143,722.30, 31,644,724.65 and 21,143,722.30 is: 31,644,724.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,722.30 : 31,644,724.65 = 21,143,722.30 : x
  2. Step 2: Convert to fraction form
    21,143,722.30/31,644,724.65 = 21,143,722.30/x
  3. Step 3: Cross multiply
    21,143,722.30x = 31,644,724.65 × 21,143,722.30
  4. Step 4: Simplify right side
    21,143,722.30x = 669,087,270,259,564.62
  5. Step 5: Solve for x
    x = 669,087,270,259,564.62/21,143,722.30
  6. Step 6: Final answer
    x = 31,644,724.65

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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.