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Finding the Fourth Proportional to 21,551,999.80, 32,327,999.70 and 20,701,694.20

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Solution

The fourth proportional to 21,551,999.80, 32,327,999.70 and 20,701,694.20 is: 31,052,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551,999.80 : 32,327,999.70 = 20,701,694.20 : x
  2. Step 2: Convert to fraction form
    21,551,999.80/32,327,999.70 = 20,701,694.20/x
  3. Step 3: Cross multiply
    21,551,999.80x = 32,327,999.70 × 20,701,694.20
  4. Step 4: Simplify right side
    21,551,999.80x = 669,244,363,887,091.75
  5. Step 5: Solve for x
    x = 669,244,363,887,091.75/21,551,999.80
  6. Step 6: Final answer
    x = 31,052,541.30

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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.