Home / 20,319.29-27,978.31-17,787.23

Finding the Fourth Proportional to 20,319.29, 27,978.31 and 17,787.23

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Solution

The fourth proportional to 20,319.29, 27,978.31 and 17,787.23 is: 24,491.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.29 : 27,978.31 = 17,787.23 : x
  2. Step 2: Convert to fraction form
    20,319.29/27,978.31 = 17,787.23/x
  3. Step 3: Cross multiply
    20,319.29x = 27,978.31 × 17,787.23
  4. Step 4: Simplify right side
    20,319.29x = 497,656,634.98
  5. Step 5: Solve for x
    x = 497,656,634.98/20,319.29
  6. Step 6: Final answer
    x = 24,491.83

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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.