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Finding the Fourth Proportional to 53,511.60, 80,209.80 and 20,218.80

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Solution

The fourth proportional to 53,511.60, 80,209.80 and 20,218.80 is: 30,306.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,511.60 : 80,209.80 = 20,218.80 : x
  2. Step 2: Convert to fraction form
    53,511.60/80,209.80 = 20,218.80/x
  3. Step 3: Cross multiply
    53,511.60x = 80,209.80 × 20,218.80
  4. Step 4: Simplify right side
    53,511.60x = 1,621,745,904.24
  5. Step 5: Solve for x
    x = 1,621,745,904.24/53,511.60
  6. Step 6: Final answer
    x = 30,306.44

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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.