Home / 21,077.88-31,618.64-5,495.50

Finding the Fourth Proportional to 21,077.88, 31,618.64 and 5,495.50

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Solution

The fourth proportional to 21,077.88, 31,618.64 and 5,495.50 is: 8,243.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.88 : 31,618.64 = 5,495.50 : x
  2. Step 2: Convert to fraction form
    21,077.88/31,618.64 = 5,495.50/x
  3. Step 3: Cross multiply
    21,077.88x = 31,618.64 × 5,495.50
  4. Step 4: Simplify right side
    21,077.88x = 173,760,236.12
  5. Step 5: Solve for x
    x = 173,760,236.12/21,077.88
  6. Step 6: Final answer
    x = 8,243.72

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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.