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Finding the Fourth Proportional to 13,919.23, 20,879.70 and 5,599.23

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Solution

The fourth proportional to 13,919.23, 20,879.70 and 5,599.23 is: 8,399.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.23 : 20,879.70 = 5,599.23 : x
  2. Step 2: Convert to fraction form
    13,919.23/20,879.70 = 5,599.23/x
  3. Step 3: Cross multiply
    13,919.23x = 20,879.70 × 5,599.23
  4. Step 4: Simplify right side
    13,919.23x = 116,910,291.21
  5. Step 5: Solve for x
    x = 116,910,291.21/13,919.23
  6. Step 6: Final answer
    x = 8,399.19

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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.