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Finding the Fourth Proportional to 20,665,699.80, 30,984,552.90 and 10,560,010.20

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Solution

The fourth proportional to 20,665,699.80, 30,984,552.90 and 10,560,010.20 is: 15,832,863.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665,699.80 : 30,984,552.90 = 10,560,010.20 : x
  2. Step 2: Convert to fraction form
    20,665,699.80/30,984,552.90 = 10,560,010.20/x
  3. Step 3: Cross multiply
    20,665,699.80x = 30,984,552.90 × 10,560,010.20
  4. Step 4: Simplify right side
    20,665,699.80x = 327,197,194,666,439.56
  5. Step 5: Solve for x
    x = 327,197,194,666,439.56/20,665,699.80
  6. Step 6: Final answer
    x = 15,832,863.05

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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.