Home / 39,361.40-54,318.38-21,456.40

Finding the Fourth Proportional to 39,361.40, 54,318.38 and 21,456.40

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Solution

The fourth proportional to 39,361.40, 54,318.38 and 21,456.40 is: 29,609.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,361.40 : 54,318.38 = 21,456.40 : x
  2. Step 2: Convert to fraction form
    39,361.40/54,318.38 = 21,456.40/x
  3. Step 3: Cross multiply
    39,361.40x = 54,318.38 × 21,456.40
  4. Step 4: Simplify right side
    39,361.40x = 1,165,476,888.63
  5. Step 5: Solve for x
    x = 1,165,476,888.63/39,361.40
  6. Step 6: Final answer
    x = 29,609.64

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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.