Home / 39,809.16-54,936.96-21,660

Finding the Fourth Proportional to 39,809.16, 54,936.96 and 21,660

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Solution

The fourth proportional to 39,809.16, 54,936.96 and 21,660 is: 29,890.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,809.16 : 54,936.96 = 21,660 : x
  2. Step 2: Convert to fraction form
    39,809.16/54,936.96 = 21,660/x
  3. Step 3: Cross multiply
    39,809.16x = 54,936.96 × 21,660
  4. Step 4: Simplify right side
    39,809.16x = 1,189,934,553.60
  5. Step 5: Solve for x
    x = 1,189,934,553.60/39,809.16
  6. Step 6: Final answer
    x = 29,890.97

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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.