Home / 20,977.18-31,464.72-7,828.54

Finding the Fourth Proportional to 20,977.18, 31,464.72 and 7,828.54

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Solution

The fourth proportional to 20,977.18, 31,464.72 and 7,828.54 is: 11,742.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.18 : 31,464.72 = 7,828.54 : x
  2. Step 2: Convert to fraction form
    20,977.18/31,464.72 = 7,828.54/x
  3. Step 3: Cross multiply
    20,977.18x = 31,464.72 × 7,828.54
  4. Step 4: Simplify right side
    20,977.18x = 246,322,819.11
  5. Step 5: Solve for x
    x = 246,322,819.11/20,977.18
  6. Step 6: Final answer
    x = 11,742.42

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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.