Home / 39,721.97-54,816.44-21,816.51

Finding the Fourth Proportional to 39,721.97, 54,816.44 and 21,816.51

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Solution

The fourth proportional to 39,721.97, 54,816.44 and 21,816.51 is: 30,106.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.97 : 54,816.44 = 21,816.51 : x
  2. Step 2: Convert to fraction form
    39,721.97/54,816.44 = 21,816.51/x
  3. Step 3: Cross multiply
    39,721.97x = 54,816.44 × 21,816.51
  4. Step 4: Simplify right side
    39,721.97x = 1,195,903,302.34
  5. Step 5: Solve for x
    x = 1,195,903,302.34/39,721.97
  6. Step 6: Final answer
    x = 30,106.85

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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.