Home / 21,257.03-31,891.78-8,777.77

Finding the Fourth Proportional to 21,257.03, 31,891.78 and 8,777.77

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Solution

The fourth proportional to 21,257.03, 31,891.78 and 8,777.77 is: 13,169.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.03 : 31,891.78 = 8,777.77 : x
  2. Step 2: Convert to fraction form
    21,257.03/31,891.78 = 8,777.77/x
  3. Step 3: Cross multiply
    21,257.03x = 31,891.78 × 8,777.77
  4. Step 4: Simplify right side
    21,257.03x = 279,938,591.60
  5. Step 5: Solve for x
    x = 279,938,591.60/21,257.03
  6. Step 6: Final answer
    x = 13,169.22

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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.