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Finding the Fourth Proportional to 21,854,433.60, 30,640,996.80 and 21,854,433.60

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Solution

The fourth proportional to 21,854,433.60, 30,640,996.80 and 21,854,433.60 is: 30,640,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854,433.60 : 30,640,996.80 = 21,854,433.60 : x
  2. Step 2: Convert to fraction form
    21,854,433.60/30,640,996.80 = 21,854,433.60/x
  3. Step 3: Cross multiply
    21,854,433.60x = 30,640,996.80 × 21,854,433.60
  4. Step 4: Simplify right side
    21,854,433.60x = 669,641,630,003,412.50
  5. Step 5: Solve for x
    x = 669,641,630,003,412.50/21,854,433.60
  6. Step 6: Final answer
    x = 30,640,996.80

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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.