Home / 13,679.78-20,511.45-6,645.93

Finding the Fourth Proportional to 13,679.78, 20,511.45 and 6,645.93

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Solution

The fourth proportional to 13,679.78, 20,511.45 and 6,645.93 is: 9,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.78 : 20,511.45 = 6,645.93 : x
  2. Step 2: Convert to fraction form
    13,679.78/20,511.45 = 6,645.93/x
  3. Step 3: Cross multiply
    13,679.78x = 20,511.45 × 6,645.93
  4. Step 4: Simplify right side
    13,679.78x = 136,317,660.90
  5. Step 5: Solve for x
    x = 136,317,660.90/13,679.78
  6. Step 6: Final answer
    x = 9,964.91

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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.