Home / 21,140.68-31,717.42-7,997.08

Finding the Fourth Proportional to 21,140.68, 31,717.42 and 7,997.08

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Solution

The fourth proportional to 21,140.68, 31,717.42 and 7,997.08 is: 11,998.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.68 : 31,717.42 = 7,997.08 : x
  2. Step 2: Convert to fraction form
    21,140.68/31,717.42 = 7,997.08/x
  3. Step 3: Cross multiply
    21,140.68x = 31,717.42 × 7,997.08
  4. Step 4: Simplify right side
    21,140.68x = 253,646,745.13
  5. Step 5: Solve for x
    x = 253,646,745.13/21,140.68
  6. Step 6: Final answer
    x = 11,998.04

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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.