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Finding the Fourth Proportional to 20,649,064.25, 30,945,694.95 and 7,862,593.79

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Solution

The fourth proportional to 20,649,064.25, 30,945,694.95 and 7,862,593.79 is: 11,783,266.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649,064.25 : 30,945,694.95 = 7,862,593.79 : x
  2. Step 2: Convert to fraction form
    20,649,064.25/30,945,694.95 = 7,862,593.79/x
  3. Step 3: Cross multiply
    20,649,064.25x = 30,945,694.95 × 7,862,593.79
  4. Step 4: Simplify right side
    20,649,064.25x = 243,313,429,018,468.59
  5. Step 5: Solve for x
    x = 243,313,429,018,468.59/20,649,064.25
  6. Step 6: Final answer
    x = 11,783,266.59

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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.