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Finding the Fourth Proportional to 20,516,821.20, 30,775,231.80 and 20,218,222.80

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Solution

The fourth proportional to 20,516,821.20, 30,775,231.80 and 20,218,222.80 is: 30,327,334.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516,821.20 : 30,775,231.80 = 20,218,222.80 : x
  2. Step 2: Convert to fraction form
    20,516,821.20/30,775,231.80 = 20,218,222.80/x
  3. Step 3: Cross multiply
    20,516,821.20x = 30,775,231.80 × 20,218,222.80
  4. Step 4: Simplify right side
    20,516,821.20x = 622,220,493,254,045.12
  5. Step 5: Solve for x
    x = 622,220,493,254,045.12/20,516,821.20
  6. Step 6: Final answer
    x = 30,327,334.20

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1.5x scale

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.