Home / 13,879.11-20,818.68-3,490.86

Finding the Fourth Proportional to 13,879.11, 20,818.68 and 3,490.86

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Solution

The fourth proportional to 13,879.11, 20,818.68 and 3,490.86 is: 5,236.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.11 : 20,818.68 = 3,490.86 : x
  2. Step 2: Convert to fraction form
    13,879.11/20,818.68 = 3,490.86/x
  3. Step 3: Cross multiply
    13,879.11x = 20,818.68 × 3,490.86
  4. Step 4: Simplify right side
    13,879.11x = 72,675,097.26
  5. Step 5: Solve for x
    x = 72,675,097.26/13,879.11
  6. Step 6: Final answer
    x = 5,236.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.