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Finding the Fourth Proportional to 21,143,396.80, 29,536,982.60 and 21,143,396.80

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Solution

The fourth proportional to 21,143,396.80, 29,536,982.60 and 21,143,396.80 is: 29,536,982.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,396.80 : 29,536,982.60 = 21,143,396.80 : x
  2. Step 2: Convert to fraction form
    21,143,396.80/29,536,982.60 = 21,143,396.80/x
  3. Step 3: Cross multiply
    21,143,396.80x = 29,536,982.60 × 21,143,396.80
  4. Step 4: Simplify right side
    21,143,396.80x = 624,512,143,386,495.75
  5. Step 5: Solve for x
    x = 624,512,143,386,495.75/21,143,396.80
  6. Step 6: Final answer
    x = 29,536,982.60

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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.