Home / 21,189.72-29,243.01-12,808.92

Finding the Fourth Proportional to 21,189.72, 29,243.01 and 12,808.92

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Solution

The fourth proportional to 21,189.72, 29,243.01 and 12,808.92 is: 17,677.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.72 : 29,243.01 = 12,808.92 : x
  2. Step 2: Convert to fraction form
    21,189.72/29,243.01 = 12,808.92/x
  3. Step 3: Cross multiply
    21,189.72x = 29,243.01 × 12,808.92
  4. Step 4: Simplify right side
    21,189.72x = 374,571,375.65
  5. Step 5: Solve for x
    x = 374,571,375.65/21,189.72
  6. Step 6: Final answer
    x = 17,677.03

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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.