Home / 20,761.80-28,651.92-11,810.60

Finding the Fourth Proportional to 20,761.80, 28,651.92 and 11,810.60

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Solution

The fourth proportional to 20,761.80, 28,651.92 and 11,810.60 is: 16,298.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.80 : 28,651.92 = 11,810.60 : x
  2. Step 2: Convert to fraction form
    20,761.80/28,651.92 = 11,810.60/x
  3. Step 3: Cross multiply
    20,761.80x = 28,651.92 × 11,810.60
  4. Step 4: Simplify right side
    20,761.80x = 338,396,366.35
  5. Step 5: Solve for x
    x = 338,396,366.35/20,761.80
  6. Step 6: Final answer
    x = 16,298.99

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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.