Home / 39,721.63-54,816.30-21,817.06

Finding the Fourth Proportional to 39,721.63, 54,816.30 and 21,817.06

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Solution

The fourth proportional to 39,721.63, 54,816.30 and 21,817.06 is: 30,107.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.63 : 54,816.30 = 21,817.06 : x
  2. Step 2: Convert to fraction form
    39,721.63/54,816.30 = 21,817.06/x
  3. Step 3: Cross multiply
    39,721.63x = 54,816.30 × 21,817.06
  4. Step 4: Simplify right side
    39,721.63x = 1,195,930,313.81
  5. Step 5: Solve for x
    x = 1,195,930,313.81/39,721.63
  6. Step 6: Final answer
    x = 30,107.78

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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.