Home / 21,131.16-29,161.91-11,699.72

Finding the Fourth Proportional to 21,131.16, 29,161.91 and 11,699.72

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Solution

The fourth proportional to 21,131.16, 29,161.91 and 11,699.72 is: 16,146.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.16 : 29,161.91 = 11,699.72 : x
  2. Step 2: Convert to fraction form
    21,131.16/29,161.91 = 11,699.72/x
  3. Step 3: Cross multiply
    21,131.16x = 29,161.91 × 11,699.72
  4. Step 4: Simplify right side
    21,131.16x = 341,186,108.65
  5. Step 5: Solve for x
    x = 341,186,108.65/21,131.16
  6. Step 6: Final answer
    x = 16,146.12

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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.