Home / 21,408.09-29,543.19-11,976.65

Finding the Fourth Proportional to 21,408.09, 29,543.19 and 11,976.65

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Solution

The fourth proportional to 21,408.09, 29,543.19 and 11,976.65 is: 16,527.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.09 : 29,543.19 = 11,976.65 : x
  2. Step 2: Convert to fraction form
    21,408.09/29,543.19 = 11,976.65/x
  3. Step 3: Cross multiply
    21,408.09x = 29,543.19 × 11,976.65
  4. Step 4: Simplify right side
    21,408.09x = 353,828,446.51
  5. Step 5: Solve for x
    x = 353,828,446.51/21,408.09
  6. Step 6: Final answer
    x = 16,527.79

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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.