Home / 15,405.05-21,258.97-8,331.48

Finding the Fourth Proportional to 15,405.05, 21,258.97 and 8,331.48

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Solution

The fourth proportional to 15,405.05, 21,258.97 and 8,331.48 is: 11,497.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.05 : 21,258.97 = 8,331.48 : x
  2. Step 2: Convert to fraction form
    15,405.05/21,258.97 = 8,331.48/x
  3. Step 3: Cross multiply
    15,405.05x = 21,258.97 × 8,331.48
  4. Step 4: Simplify right side
    15,405.05x = 177,118,662.55
  5. Step 5: Solve for x
    x = 177,118,662.55/15,405.05
  6. Step 6: Final answer
    x = 11,497.44

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Similar ratio
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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.