Home / 15,456.87-21,330.36-8,383.29

Finding the Fourth Proportional to 15,456.87, 21,330.36 and 8,383.29

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Solution

The fourth proportional to 15,456.87, 21,330.36 and 8,383.29 is: 11,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.87 : 21,330.36 = 8,383.29 : x
  2. Step 2: Convert to fraction form
    15,456.87/21,330.36 = 8,383.29/x
  3. Step 3: Cross multiply
    15,456.87x = 21,330.36 × 8,383.29
  4. Step 4: Simplify right side
    15,456.87x = 178,818,593.68
  5. Step 5: Solve for x
    x = 178,818,593.68/15,456.87
  6. Step 6: Final answer
    x = 11,568.87

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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.