Home / 38,639.72-53,321.46-21,872.36

Finding the Fourth Proportional to 38,639.72, 53,321.46 and 21,872.36

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Solution

The fourth proportional to 38,639.72, 53,321.46 and 21,872.36 is: 30,183.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.72 : 53,321.46 = 21,872.36 : x
  2. Step 2: Convert to fraction form
    38,639.72/53,321.46 = 21,872.36/x
  3. Step 3: Cross multiply
    38,639.72x = 53,321.46 × 21,872.36
  4. Step 4: Simplify right side
    38,639.72x = 1,166,266,168.85
  5. Step 5: Solve for x
    x = 1,166,266,168.85/38,639.72
  6. Step 6: Final answer
    x = 30,183.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.