Home / 15,419.82-21,279.37-8,346.23

Finding the Fourth Proportional to 15,419.82, 21,279.37 and 8,346.23

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Solution

The fourth proportional to 15,419.82, 21,279.37 and 8,346.23 is: 11,517.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.82 : 21,279.37 = 8,346.23 : x
  2. Step 2: Convert to fraction form
    15,419.82/21,279.37 = 8,346.23/x
  3. Step 3: Cross multiply
    15,419.82x = 21,279.37 × 8,346.23
  4. Step 4: Simplify right side
    15,419.82x = 177,602,516.28
  5. Step 5: Solve for x
    x = 177,602,516.28/15,419.82
  6. Step 6: Final answer
    x = 11,517.81

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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.