Home / 11,728.39-16,185.05-6,422.89

Finding the Fourth Proportional to 11,728.39, 16,185.05 and 6,422.89

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Solution

The fourth proportional to 11,728.39, 16,185.05 and 6,422.89 is: 8,863.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,728.39 : 16,185.05 = 6,422.89 : x
  2. Step 2: Convert to fraction form
    11,728.39/16,185.05 = 6,422.89/x
  3. Step 3: Cross multiply
    11,728.39x = 16,185.05 × 6,422.89
  4. Step 4: Simplify right side
    11,728.39x = 103,954,795.79
  5. Step 5: Solve for x
    x = 103,954,795.79/11,728.39
  6. Step 6: Final answer
    x = 8,863.52

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Half scale
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Double scale
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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.