Home / 21,102.12-31,620.38-7,947.32

Finding the Fourth Proportional to 21,102.12, 31,620.38 and 7,947.32

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Solution

The fourth proportional to 21,102.12, 31,620.38 and 7,947.32 is: 11,908.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.12 : 31,620.38 = 7,947.32 : x
  2. Step 2: Convert to fraction form
    21,102.12/31,620.38 = 7,947.32/x
  3. Step 3: Cross multiply
    21,102.12x = 31,620.38 × 7,947.32
  4. Step 4: Simplify right side
    21,102.12x = 251,297,080.54
  5. Step 5: Solve for x
    x = 251,297,080.54/21,102.12
  6. Step 6: Final answer
    x = 11,908.62

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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.