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Finding the Fourth Proportional to 17,815.20, 26,722.80 and 15,919.80

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Solution

The fourth proportional to 17,815.20, 26,722.80 and 15,919.80 is: 23,879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,815.20 : 26,722.80 = 15,919.80 : x
  2. Step 2: Convert to fraction form
    17,815.20/26,722.80 = 15,919.80/x
  3. Step 3: Cross multiply
    17,815.20x = 26,722.80 × 15,919.80
  4. Step 4: Simplify right side
    17,815.20x = 425,421,631.44
  5. Step 5: Solve for x
    x = 425,421,631.44/17,815.20
  6. Step 6: Final answer
    x = 23,879.70

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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.