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Finding the Fourth Proportional to 8,909.60, 13,338.80 and 5,453.60

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Solution

The fourth proportional to 8,909.60, 13,338.80 and 5,453.60 is: 8,164.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.60 : 13,338.80 = 5,453.60 : x
  2. Step 2: Convert to fraction form
    8,909.60/13,338.80 = 5,453.60/x
  3. Step 3: Cross multiply
    8,909.60x = 13,338.80 × 5,453.60
  4. Step 4: Simplify right side
    8,909.60x = 72,744,479.68
  5. Step 5: Solve for x
    x = 72,744,479.68/8,909.60
  6. Step 6: Final answer
    x = 8,164.73

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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.