Home / 15,456.71-21,330.24-8,383.12

Finding the Fourth Proportional to 15,456.71, 21,330.24 and 8,383.12

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Solution

The fourth proportional to 15,456.71, 21,330.24 and 8,383.12 is: 11,568.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.71 : 21,330.24 = 8,383.12 : x
  2. Step 2: Convert to fraction form
    15,456.71/21,330.24 = 8,383.12/x
  3. Step 3: Cross multiply
    15,456.71x = 21,330.24 × 8,383.12
  4. Step 4: Simplify right side
    15,456.71x = 178,813,961.55
  5. Step 5: Solve for x
    x = 178,813,961.55/15,456.71
  6. Step 6: Final answer
    x = 11,568.69

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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.