Home / 20,091.78-27,730.80-13,377.69

Finding the Fourth Proportional to 20,091.78, 27,730.80 and 13,377.69

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Solution

The fourth proportional to 20,091.78, 27,730.80 and 13,377.69 is: 18,463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.78 : 27,730.80 = 13,377.69 : x
  2. Step 2: Convert to fraction form
    20,091.78/27,730.80 = 13,377.69/x
  3. Step 3: Cross multiply
    20,091.78x = 27,730.80 × 13,377.69
  4. Step 4: Simplify right side
    20,091.78x = 370,974,045.85
  5. Step 5: Solve for x
    x = 370,974,045.85/20,091.78
  6. Step 6: Final answer
    x = 18,463.97

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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.