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Finding the Fourth Proportional to 33,986.80, 50,980.20 and 21,520.90

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Solution

The fourth proportional to 33,986.80, 50,980.20 and 21,520.90 is: 32,281.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,986.80 : 50,980.20 = 21,520.90 : x
  2. Step 2: Convert to fraction form
    33,986.80/50,980.20 = 21,520.90/x
  3. Step 3: Cross multiply
    33,986.80x = 50,980.20 × 21,520.90
  4. Step 4: Simplify right side
    33,986.80x = 1,097,139,786.18
  5. Step 5: Solve for x
    x = 1,097,139,786.18/33,986.80
  6. Step 6: Final answer
    x = 32,281.35

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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.