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Finding the Fourth Proportional to 18,909.10, 28,363.65 and 9,067.60

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Solution

The fourth proportional to 18,909.10, 28,363.65 and 9,067.60 is: 13,601.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.10 : 28,363.65 = 9,067.60 : x
  2. Step 2: Convert to fraction form
    18,909.10/28,363.65 = 9,067.60/x
  3. Step 3: Cross multiply
    18,909.10x = 28,363.65 × 9,067.60
  4. Step 4: Simplify right side
    18,909.10x = 257,190,232.74
  5. Step 5: Solve for x
    x = 257,190,232.74/18,909.10
  6. Step 6: Final answer
    x = 13,601.40

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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.