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Finding the Fourth Proportional to 53,919.70, 80,879.55 and 18,855.70

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Solution

The fourth proportional to 53,919.70, 80,879.55 and 18,855.70 is: 28,283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,919.70 : 80,879.55 = 18,855.70 : x
  2. Step 2: Convert to fraction form
    53,919.70/80,879.55 = 18,855.70/x
  3. Step 3: Cross multiply
    53,919.70x = 80,879.55 × 18,855.70
  4. Step 4: Simplify right side
    53,919.70x = 1,525,040,530.94
  5. Step 5: Solve for x
    x = 1,525,040,530.94/53,919.70
  6. Step 6: Final answer
    x = 28,283.55

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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.