Home / 11,515.38-15,890.09-6,479.49

Finding the Fourth Proportional to 11,515.38, 15,890.09 and 6,479.49

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Solution

The fourth proportional to 11,515.38, 15,890.09 and 6,479.49 is: 8,941.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.38 : 15,890.09 = 6,479.49 : x
  2. Step 2: Convert to fraction form
    11,515.38/15,890.09 = 6,479.49/x
  3. Step 3: Cross multiply
    11,515.38x = 15,890.09 × 6,479.49
  4. Step 4: Simplify right side
    11,515.38x = 102,959,679.25
  5. Step 5: Solve for x
    x = 102,959,679.25/11,515.38
  6. Step 6: Final answer
    x = 8,941.06

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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.