Home / 21,121,105.56-31,694,986.02-8,990,549.22

Finding the Fourth Proportional to 21,121,105.56, 31,694,986.02 and 8,990,549.22

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Solution

The fourth proportional to 21,121,105.56, 31,694,986.02 and 8,990,549.22 is: 13,491,496.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,105.56 : 31,694,986.02 = 8,990,549.22 : x
  2. Step 2: Convert to fraction form
    21,121,105.56/31,694,986.02 = 8,990,549.22/x
  3. Step 3: Cross multiply
    21,121,105.56x = 31,694,986.02 × 8,990,549.22
  4. Step 4: Simplify right side
    21,121,105.56x = 284,955,331,840,021.94
  5. Step 5: Solve for x
    x = 284,955,331,840,021.94/21,121,105.56
  6. Step 6: Final answer
    x = 13,491,496.98

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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.