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Finding the Fourth Proportional to 53,911.60, 80,867.40 and 18,854.80

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Solution

The fourth proportional to 53,911.60, 80,867.40 and 18,854.80 is: 28,282.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,911.60 : 80,867.40 = 18,854.80 : x
  2. Step 2: Convert to fraction form
    53,911.60/80,867.40 = 18,854.80/x
  3. Step 3: Cross multiply
    53,911.60x = 80,867.40 × 18,854.80
  4. Step 4: Simplify right side
    53,911.60x = 1,524,738,653.52
  5. Step 5: Solve for x
    x = 1,524,738,653.52/53,911.60
  6. Step 6: Final answer
    x = 28,282.20

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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.