Home / 21,112.32-31,677-7,968.48

Finding the Fourth Proportional to 21,112.32, 31,677 and 7,968.48

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Solution

The fourth proportional to 21,112.32, 31,677 and 7,968.48 is: 11,955.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.32 : 31,677 = 7,968.48 : x
  2. Step 2: Convert to fraction form
    21,112.32/31,677 = 7,968.48/x
  3. Step 3: Cross multiply
    21,112.32x = 31,677 × 7,968.48
  4. Step 4: Simplify right side
    21,112.32x = 252,417,540.96
  5. Step 5: Solve for x
    x = 252,417,540.96/21,112.32
  6. Step 6: Final answer
    x = 11,955.94

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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.