Home / 21,908.76-30,234.11-11,837.20

Finding the Fourth Proportional to 21,908.76, 30,234.11 and 11,837.20

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Solution

The fourth proportional to 21,908.76, 30,234.11 and 11,837.20 is: 16,335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.76 : 30,234.11 = 11,837.20 : x
  2. Step 2: Convert to fraction form
    21,908.76/30,234.11 = 11,837.20/x
  3. Step 3: Cross multiply
    21,908.76x = 30,234.11 × 11,837.20
  4. Step 4: Simplify right side
    21,908.76x = 357,887,147.71
  5. Step 5: Solve for x
    x = 357,887,147.71/21,908.76
  6. Step 6: Final answer
    x = 16,335.34

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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.