Home / 12,479-17,221.14-6,890.12

Finding the Fourth Proportional to 12,479, 17,221.14 and 6,890.12

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Solution

The fourth proportional to 12,479, 17,221.14 and 6,890.12 is: 9,508.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479 : 17,221.14 = 6,890.12 : x
  2. Step 2: Convert to fraction form
    12,479/17,221.14 = 6,890.12/x
  3. Step 3: Cross multiply
    12,479x = 17,221.14 × 6,890.12
  4. Step 4: Simplify right side
    12,479x = 118,655,721.14
  5. Step 5: Solve for x
    x = 118,655,721.14/12,479
  6. Step 6: Final answer
    x = 9,508.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.