Home / 20,888.89-28,826.79-11,936.72

Finding the Fourth Proportional to 20,888.89, 28,826.79 and 11,936.72

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Solution

The fourth proportional to 20,888.89, 28,826.79 and 11,936.72 is: 16,472.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.89 : 28,826.79 = 11,936.72 : x
  2. Step 2: Convert to fraction form
    20,888.89/28,826.79 = 11,936.72/x
  3. Step 3: Cross multiply
    20,888.89x = 28,826.79 × 11,936.72
  4. Step 4: Simplify right side
    20,888.89x = 344,097,185.88
  5. Step 5: Solve for x
    x = 344,097,185.88/20,888.89
  6. Step 6: Final answer
    x = 16,472.74

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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.