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Finding the Fourth Proportional to 16,879.70, 25,319.55 and 13,599.20

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Solution

The fourth proportional to 16,879.70, 25,319.55 and 13,599.20 is: 20,398.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,879.70 : 25,319.55 = 13,599.20 : x
  2. Step 2: Convert to fraction form
    16,879.70/25,319.55 = 13,599.20/x
  3. Step 3: Cross multiply
    16,879.70x = 25,319.55 × 13,599.20
  4. Step 4: Simplify right side
    16,879.70x = 344,325,624.36
  5. Step 5: Solve for x
    x = 344,325,624.36/16,879.70
  6. Step 6: Final answer
    x = 20,398.80

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Similar ratio
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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.