Home / 20,853.12-28,777.50-11,900.58

Finding the Fourth Proportional to 20,853.12, 28,777.50 and 11,900.58

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Solution

The fourth proportional to 20,853.12, 28,777.50 and 11,900.58 is: 16,422.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.12 : 28,777.50 = 11,900.58 : x
  2. Step 2: Convert to fraction form
    20,853.12/28,777.50 = 11,900.58/x
  3. Step 3: Cross multiply
    20,853.12x = 28,777.50 × 11,900.58
  4. Step 4: Simplify right side
    20,853.12x = 342,468,940.95
  5. Step 5: Solve for x
    x = 342,468,940.95/20,853.12
  6. Step 6: Final answer
    x = 16,422.91

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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.