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Finding the Fourth Proportional to 33,387.10, 50,117.10 and 20,921.20

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Solution

The fourth proportional to 33,387.10, 50,117.10 and 20,921.20 is: 31,404.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,387.10 : 50,117.10 = 20,921.20 : x
  2. Step 2: Convert to fraction form
    33,387.10/50,117.10 = 20,921.20/x
  3. Step 3: Cross multiply
    33,387.10x = 50,117.10 × 20,921.20
  4. Step 4: Simplify right side
    33,387.10x = 1,048,509,872.52
  5. Step 5: Solve for x
    x = 1,048,509,872.52/33,387.10
  6. Step 6: Final answer
    x = 31,404.64

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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.