Home / 20,778.71-28,675.37-11,826.95

Finding the Fourth Proportional to 20,778.71, 28,675.37 and 11,826.95

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Solution

The fourth proportional to 20,778.71, 28,675.37 and 11,826.95 is: 16,321.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.71 : 28,675.37 = 11,826.95 : x
  2. Step 2: Convert to fraction form
    20,778.71/28,675.37 = 11,826.95/x
  3. Step 3: Cross multiply
    20,778.71x = 28,675.37 × 11,826.95
  4. Step 4: Simplify right side
    20,778.71x = 339,142,053.41
  5. Step 5: Solve for x
    x = 339,142,053.41/20,778.71
  6. Step 6: Final answer
    x = 16,321.62

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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.