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Finding the Fourth Proportional to 39,361.71, 54,318.71 and 21,456.32

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Solution

The fourth proportional to 39,361.71, 54,318.71 and 21,456.32 is: 29,609.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,361.71 : 54,318.71 = 21,456.32 : x
  2. Step 2: Convert to fraction form
    39,361.71/54,318.71 = 21,456.32/x
  3. Step 3: Cross multiply
    39,361.71x = 54,318.71 × 21,456.32
  4. Step 4: Simplify right side
    39,361.71x = 1,165,479,623.75
  5. Step 5: Solve for x
    x = 1,165,479,623.75/39,361.71
  6. Step 6: Final answer
    x = 29,609.48

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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.