Home / 20,826.84-31,240.62-7,672.44

Finding the Fourth Proportional to 20,826.84, 31,240.62 and 7,672.44

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Solution

The fourth proportional to 20,826.84, 31,240.62 and 7,672.44 is: 11,508.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.84 : 31,240.62 = 7,672.44 : x
  2. Step 2: Convert to fraction form
    20,826.84/31,240.62 = 7,672.44/x
  3. Step 3: Cross multiply
    20,826.84x = 31,240.62 × 7,672.44
  4. Step 4: Simplify right side
    20,826.84x = 239,691,782.51
  5. Step 5: Solve for x
    x = 239,691,782.51/20,826.84
  6. Step 6: Final answer
    x = 11,508.79

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1.5x scale

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.