Home / 21,273.12-31,905.56-8,122.36

Finding the Fourth Proportional to 21,273.12, 31,905.56 and 8,122.36

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Solution

The fourth proportional to 21,273.12, 31,905.56 and 8,122.36 is: 12,181.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.12 : 31,905.56 = 8,122.36 : x
  2. Step 2: Convert to fraction form
    21,273.12/31,905.56 = 8,122.36/x
  3. Step 3: Cross multiply
    21,273.12x = 31,905.56 × 8,122.36
  4. Step 4: Simplify right side
    21,273.12x = 259,148,458.82
  5. Step 5: Solve for x
    x = 259,148,458.82/21,273.12
  6. Step 6: Final answer
    x = 12,181.97

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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.