Home / 21,189.06-29,243.25-12,239.46

Finding the Fourth Proportional to 21,189.06, 29,243.25 and 12,239.46

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Solution

The fourth proportional to 21,189.06, 29,243.25 and 12,239.46 is: 16,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.06 : 29,243.25 = 12,239.46 : x
  2. Step 2: Convert to fraction form
    21,189.06/29,243.25 = 12,239.46/x
  3. Step 3: Cross multiply
    21,189.06x = 29,243.25 × 12,239.46
  4. Step 4: Simplify right side
    21,189.06x = 357,921,588.65
  5. Step 5: Solve for x
    x = 357,921,588.65/21,189.06
  6. Step 6: Final answer
    x = 16,891.81

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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.