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Finding the Fourth Proportional to 19,151.60, 28,662.60 and 16,818.80

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Solution

The fourth proportional to 19,151.60, 28,662.60 and 16,818.80 is: 25,171.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,151.60 : 28,662.60 = 16,818.80 : x
  2. Step 2: Convert to fraction form
    19,151.60/28,662.60 = 16,818.80/x
  3. Step 3: Cross multiply
    19,151.60x = 28,662.60 × 16,818.80
  4. Step 4: Simplify right side
    19,151.60x = 482,070,536.88
  5. Step 5: Solve for x
    x = 482,070,536.88/19,151.60
  6. Step 6: Final answer
    x = 25,171.29

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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.