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Finding the Fourth Proportional to 33,615.20, 50,422.80 and 8,991.20

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Solution

The fourth proportional to 33,615.20, 50,422.80 and 8,991.20 is: 13,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,615.20 : 50,422.80 = 8,991.20 : x
  2. Step 2: Convert to fraction form
    33,615.20/50,422.80 = 8,991.20/x
  3. Step 3: Cross multiply
    33,615.20x = 50,422.80 × 8,991.20
  4. Step 4: Simplify right side
    33,615.20x = 453,361,479.36
  5. Step 5: Solve for x
    x = 453,361,479.36/33,615.20
  6. Step 6: Final answer
    x = 13,486.80

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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.