Home / 20,083.10-27,711.30-13,378.72

Finding the Fourth Proportional to 20,083.10, 27,711.30 and 13,378.72

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Solution

The fourth proportional to 20,083.10, 27,711.30 and 13,378.72 is: 18,460.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,083.10 : 27,711.30 = 13,378.72 : x
  2. Step 2: Convert to fraction form
    20,083.10/27,711.30 = 13,378.72/x
  3. Step 3: Cross multiply
    20,083.10x = 27,711.30 × 13,378.72
  4. Step 4: Simplify right side
    20,083.10x = 370,741,723.54
  5. Step 5: Solve for x
    x = 370,741,723.54/20,083.10
  6. Step 6: Final answer
    x = 18,460.38

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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.