Home / 21,330.14-31,995.20-11,455.84

Finding the Fourth Proportional to 21,330.14, 31,995.20 and 11,455.84

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Solution

The fourth proportional to 21,330.14, 31,995.20 and 11,455.84 is: 17,183.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.14 : 31,995.20 = 11,455.84 : x
  2. Step 2: Convert to fraction form
    21,330.14/31,995.20 = 11,455.84/x
  3. Step 3: Cross multiply
    21,330.14x = 31,995.20 × 11,455.84
  4. Step 4: Simplify right side
    21,330.14x = 366,531,891.97
  5. Step 5: Solve for x
    x = 366,531,891.97/21,330.14
  6. Step 6: Final answer
    x = 17,183.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.