Home / 20,787.54-31,188.33-8,935.89

Finding the Fourth Proportional to 20,787.54, 31,188.33 and 8,935.89

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Solution

The fourth proportional to 20,787.54, 31,188.33 and 8,935.89 is: 13,406.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.54 : 31,188.33 = 8,935.89 : x
  2. Step 2: Convert to fraction form
    20,787.54/31,188.33 = 8,935.89/x
  3. Step 3: Cross multiply
    20,787.54x = 31,188.33 × 8,935.89
  4. Step 4: Simplify right side
    20,787.54x = 278,695,486.16
  5. Step 5: Solve for x
    x = 278,695,486.16/20,787.54
  6. Step 6: Final answer
    x = 13,406.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.