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Finding the Fourth Proportional to 20,809,605.60, 31,214,408.40 and 20,809,605.60

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Solution

The fourth proportional to 20,809,605.60, 31,214,408.40 and 20,809,605.60 is: 31,214,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809,605.60 : 31,214,408.40 = 20,809,605.60 : x
  2. Step 2: Convert to fraction form
    20,809,605.60/31,214,408.40 = 20,809,605.60/x
  3. Step 3: Cross multiply
    20,809,605.60x = 31,214,408.40 × 20,809,605.60
  4. Step 4: Simplify right side
    20,809,605.60x = 649,559,527,841,327
  5. Step 5: Solve for x
    x = 649,559,527,841,327/20,809,605.60
  6. Step 6: Final answer
    x = 31,214,408.40

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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.