Home / 21,177.39-31,723.73-12,739.24

Finding the Fourth Proportional to 21,177.39, 31,723.73 and 12,739.24

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Solution

The fourth proportional to 21,177.39, 31,723.73 and 12,739.24 is: 19,083.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.39 : 31,723.73 = 12,739.24 : x
  2. Step 2: Convert to fraction form
    21,177.39/31,723.73 = 12,739.24/x
  3. Step 3: Cross multiply
    21,177.39x = 31,723.73 × 12,739.24
  4. Step 4: Simplify right side
    21,177.39x = 404,136,233.90
  5. Step 5: Solve for x
    x = 404,136,233.90/21,177.39
  6. Step 6: Final answer
    x = 19,083.38

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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.