Home / 20,876.78-31,293.30-9,774.52

Finding the Fourth Proportional to 20,876.78, 31,293.30 and 9,774.52

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Solution

The fourth proportional to 20,876.78, 31,293.30 and 9,774.52 is: 14,651.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.78 : 31,293.30 = 9,774.52 : x
  2. Step 2: Convert to fraction form
    20,876.78/31,293.30 = 9,774.52/x
  3. Step 3: Cross multiply
    20,876.78x = 31,293.30 × 9,774.52
  4. Step 4: Simplify right side
    20,876.78x = 305,876,986.72
  5. Step 5: Solve for x
    x = 305,876,986.72/20,876.78
  6. Step 6: Final answer
    x = 14,651.54

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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.