Home / 20,787.54-31,181.30-7,634.22

Finding the Fourth Proportional to 20,787.54, 31,181.30 and 7,634.22

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Solution

The fourth proportional to 20,787.54, 31,181.30 and 7,634.22 is: 11,451.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.54 : 31,181.30 = 7,634.22 : x
  2. Step 2: Convert to fraction form
    20,787.54/31,181.30 = 7,634.22/x
  3. Step 3: Cross multiply
    20,787.54x = 31,181.30 × 7,634.22
  4. Step 4: Simplify right side
    20,787.54x = 238,044,904.09
  5. Step 5: Solve for x
    x = 238,044,904.09/20,787.54
  6. Step 6: Final answer
    x = 11,451.33

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1.5x scale

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.