Home / 15,419.33-21,278.68-8,345.73

Finding the Fourth Proportional to 15,419.33, 21,278.68 and 8,345.73

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Solution

The fourth proportional to 15,419.33, 21,278.68 and 8,345.73 is: 11,517.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.33 : 21,278.68 = 8,345.73 : x
  2. Step 2: Convert to fraction form
    15,419.33/21,278.68 = 8,345.73/x
  3. Step 3: Cross multiply
    15,419.33x = 21,278.68 × 8,345.73
  4. Step 4: Simplify right side
    15,419.33x = 177,586,118.04
  5. Step 5: Solve for x
    x = 177,586,118.04/15,419.33
  6. Step 6: Final answer
    x = 11,517.11

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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.