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Finding the Fourth Proportional to 18,819.60, 28,200.60 and 17,782.80

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Solution

The fourth proportional to 18,819.60, 28,200.60 and 17,782.80 is: 26,646.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.60 : 28,200.60 = 17,782.80 : x
  2. Step 2: Convert to fraction form
    18,819.60/28,200.60 = 17,782.80/x
  3. Step 3: Cross multiply
    18,819.60x = 28,200.60 × 17,782.80
  4. Step 4: Simplify right side
    18,819.60x = 501,485,629.68
  5. Step 5: Solve for x
    x = 501,485,629.68/18,819.60
  6. Step 6: Final answer
    x = 26,646.99

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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.