Home / 21,080.31-31,621.70-7,932.79

Finding the Fourth Proportional to 21,080.31, 31,621.70 and 7,932.79

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Solution

The fourth proportional to 21,080.31, 31,621.70 and 7,932.79 is: 11,899.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.31 : 31,621.70 = 7,932.79 : x
  2. Step 2: Convert to fraction form
    21,080.31/31,621.70 = 7,932.79/x
  3. Step 3: Cross multiply
    21,080.31x = 31,621.70 × 7,932.79
  4. Step 4: Simplify right side
    21,080.31x = 250,848,305.54
  5. Step 5: Solve for x
    x = 250,848,305.54/21,080.31
  6. Step 6: Final answer
    x = 11,899.65

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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.