Home / 39,721.17-54,815.90-21,816.93

Finding the Fourth Proportional to 39,721.17, 54,815.90 and 21,816.93

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Solution

The fourth proportional to 39,721.17, 54,815.90 and 21,816.93 is: 30,107.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.17 : 54,815.90 = 21,816.93 : x
  2. Step 2: Convert to fraction form
    39,721.17/54,815.90 = 21,816.93/x
  3. Step 3: Cross multiply
    39,721.17x = 54,815.90 × 21,816.93
  4. Step 4: Simplify right side
    39,721.17x = 1,195,914,653.19
  5. Step 5: Solve for x
    x = 1,195,914,653.19/39,721.17
  6. Step 6: Final answer
    x = 30,107.74

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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.