Home / 15,481.78-21,365.28-9,108.82

Finding the Fourth Proportional to 15,481.78, 21,365.28 and 9,108.82

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Solution

The fourth proportional to 15,481.78, 21,365.28 and 9,108.82 is: 12,570.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.78 : 21,365.28 = 9,108.82 : x
  2. Step 2: Convert to fraction form
    15,481.78/21,365.28 = 9,108.82/x
  3. Step 3: Cross multiply
    15,481.78x = 21,365.28 × 9,108.82
  4. Step 4: Simplify right side
    15,481.78x = 194,612,489.77
  5. Step 5: Solve for x
    x = 194,612,489.77/15,481.78
  6. Step 6: Final answer
    x = 12,570.42

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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.