Home / 20,851.98-28,777.80-11,900.84

Finding the Fourth Proportional to 20,851.98, 28,777.80 and 11,900.84

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Solution

The fourth proportional to 20,851.98, 28,777.80 and 11,900.84 is: 16,424.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.98 : 28,777.80 = 11,900.84 : x
  2. Step 2: Convert to fraction form
    20,851.98/28,777.80 = 11,900.84/x
  3. Step 3: Cross multiply
    20,851.98x = 28,777.80 × 11,900.84
  4. Step 4: Simplify right side
    20,851.98x = 342,479,789.96
  5. Step 5: Solve for x
    x = 342,479,789.96/20,851.98
  6. Step 6: Final answer
    x = 16,424.33

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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.