Home / 15,419.70-21,279.15-8,346.12

Finding the Fourth Proportional to 15,419.70, 21,279.15 and 8,346.12

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Solution

The fourth proportional to 15,419.70, 21,279.15 and 8,346.12 is: 11,517.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.70 : 21,279.15 = 8,346.12 : x
  2. Step 2: Convert to fraction form
    15,419.70/21,279.15 = 8,346.12/x
  3. Step 3: Cross multiply
    15,419.70x = 21,279.15 × 8,346.12
  4. Step 4: Simplify right side
    15,419.70x = 177,598,339.40
  5. Step 5: Solve for x
    x = 177,598,339.40/15,419.70
  6. Step 6: Final answer
    x = 11,517.63

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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.