Home / 15,789.98-21,790.20-8,716.41

Finding the Fourth Proportional to 15,789.98, 21,790.20 and 8,716.41

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Solution

The fourth proportional to 15,789.98, 21,790.20 and 8,716.41 is: 12,028.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.98 : 21,790.20 = 8,716.41 : x
  2. Step 2: Convert to fraction form
    15,789.98/21,790.20 = 8,716.41/x
  3. Step 3: Cross multiply
    15,789.98x = 21,790.20 × 8,716.41
  4. Step 4: Simplify right side
    15,789.98x = 189,932,164.65
  5. Step 5: Solve for x
    x = 189,932,164.65/15,789.98
  6. Step 6: Final answer
    x = 12,028.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.