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Finding the Fourth Proportional to 33,689.20, 50,575.40 and 21,209.20

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Solution

The fourth proportional to 33,689.20, 50,575.40 and 21,209.20 is: 31,839.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,689.20 : 50,575.40 = 21,209.20 : x
  2. Step 2: Convert to fraction form
    33,689.20/50,575.40 = 21,209.20/x
  3. Step 3: Cross multiply
    33,689.20x = 50,575.40 × 21,209.20
  4. Step 4: Simplify right side
    33,689.20x = 1,072,663,773.68
  5. Step 5: Solve for x
    x = 1,072,663,773.68/33,689.20
  6. Step 6: Final answer
    x = 31,839.99

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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.