Home / 39,721.19-54,813.07-21,813.31

Finding the Fourth Proportional to 39,721.19, 54,813.07 and 21,813.31

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Solution

The fourth proportional to 39,721.19, 54,813.07 and 21,813.31 is: 30,101.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.19 : 54,813.07 = 21,813.31 : x
  2. Step 2: Convert to fraction form
    39,721.19/54,813.07 = 21,813.31/x
  3. Step 3: Cross multiply
    39,721.19x = 54,813.07 × 21,813.31
  4. Step 4: Simplify right side
    39,721.19x = 1,195,654,487.96
  5. Step 5: Solve for x
    x = 1,195,654,487.96/39,721.19
  6. Step 6: Final answer
    x = 30,101.17

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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.