Home / 11,721.35-16,175.90-6,686.39

Finding the Fourth Proportional to 11,721.35, 16,175.90 and 6,686.39

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Solution

The fourth proportional to 11,721.35, 16,175.90 and 6,686.39 is: 9,227.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.35 : 16,175.90 = 6,686.39 : x
  2. Step 2: Convert to fraction form
    11,721.35/16,175.90 = 6,686.39/x
  3. Step 3: Cross multiply
    11,721.35x = 16,175.90 × 6,686.39
  4. Step 4: Simplify right side
    11,721.35x = 108,158,311.84
  5. Step 5: Solve for x
    x = 108,158,311.84/11,721.35
  6. Step 6: Final answer
    x = 9,227.47

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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.