Home / 20,976.78-31,460.85-9,282.54

Finding the Fourth Proportional to 20,976.78, 31,460.85 and 9,282.54

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Solution

The fourth proportional to 20,976.78, 31,460.85 and 9,282.54 is: 13,921.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.78 : 31,460.85 = 9,282.54 : x
  2. Step 2: Convert to fraction form
    20,976.78/31,460.85 = 9,282.54/x
  3. Step 3: Cross multiply
    20,976.78x = 31,460.85 × 9,282.54
  4. Step 4: Simplify right side
    20,976.78x = 292,036,598.56
  5. Step 5: Solve for x
    x = 292,036,598.56/20,976.78
  6. Step 6: Final answer
    x = 13,921.90

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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.