Home / 15,324.70-21,146.79-8,609.80

Finding the Fourth Proportional to 15,324.70, 21,146.79 and 8,609.80

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Solution

The fourth proportional to 15,324.70, 21,146.79 and 8,609.80 is: 11,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,324.70 : 21,146.79 = 8,609.80 : x
  2. Step 2: Convert to fraction form
    15,324.70/21,146.79 = 8,609.80/x
  3. Step 3: Cross multiply
    15,324.70x = 21,146.79 × 8,609.80
  4. Step 4: Simplify right side
    15,324.70x = 182,069,632.54
  5. Step 5: Solve for x
    x = 182,069,632.54/15,324.70
  6. Step 6: Final answer
    x = 11,880.80

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Double scale
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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.