Home / 21,083.73-31,390.62-20,789.40

Finding the Fourth Proportional to 21,083.73, 31,390.62 and 20,789.40

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Solution

The fourth proportional to 21,083.73, 31,390.62 and 20,789.40 is: 30,952.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.73 : 31,390.62 = 20,789.40 : x
  2. Step 2: Convert to fraction form
    21,083.73/31,390.62 = 20,789.40/x
  3. Step 3: Cross multiply
    21,083.73x = 31,390.62 × 20,789.40
  4. Step 4: Simplify right side
    21,083.73x = 652,592,155.43
  5. Step 5: Solve for x
    x = 652,592,155.43/21,083.73
  6. Step 6: Final answer
    x = 30,952.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.