Home / 12,479.12-17,221.08-6,890

Finding the Fourth Proportional to 12,479.12, 17,221.08 and 6,890

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Solution

The fourth proportional to 12,479.12, 17,221.08 and 6,890 is: 9,508.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.12 : 17,221.08 = 6,890 : x
  2. Step 2: Convert to fraction form
    12,479.12/17,221.08 = 6,890/x
  3. Step 3: Cross multiply
    12,479.12x = 17,221.08 × 6,890
  4. Step 4: Simplify right side
    12,479.12x = 118,653,241.20
  5. Step 5: Solve for x
    x = 118,653,241.20/12,479.12
  6. Step 6: Final answer
    x = 9,508.14

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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.