Home / 21,239.06-29,305.41-12,747.38

Finding the Fourth Proportional to 21,239.06, 29,305.41 and 12,747.38

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Solution

The fourth proportional to 21,239.06, 29,305.41 and 12,747.38 is: 17,588.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.06 : 29,305.41 = 12,747.38 : x
  2. Step 2: Convert to fraction form
    21,239.06/29,305.41 = 12,747.38/x
  3. Step 3: Cross multiply
    21,239.06x = 29,305.41 × 12,747.38
  4. Step 4: Simplify right side
    21,239.06x = 373,567,197.33
  5. Step 5: Solve for x
    x = 373,567,197.33/21,239.06
  6. Step 6: Final answer
    x = 17,588.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.