Home / 20,375.79-28,118.66-11,883.77

Finding the Fourth Proportional to 20,375.79, 28,118.66 and 11,883.77

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Solution

The fourth proportional to 20,375.79, 28,118.66 and 11,883.77 is: 16,399.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.79 : 28,118.66 = 11,883.77 : x
  2. Step 2: Convert to fraction form
    20,375.79/28,118.66 = 11,883.77/x
  3. Step 3: Cross multiply
    20,375.79x = 28,118.66 × 11,883.77
  4. Step 4: Simplify right side
    20,375.79x = 334,155,628.73
  5. Step 5: Solve for x
    x = 334,155,628.73/20,375.79
  6. Step 6: Final answer
    x = 16,399.64

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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.