Home / 21,108.25-29,129.70-11,676.79

Finding the Fourth Proportional to 21,108.25, 29,129.70 and 11,676.79

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Solution

The fourth proportional to 21,108.25, 29,129.70 and 11,676.79 is: 16,114.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.25 : 29,129.70 = 11,676.79 : x
  2. Step 2: Convert to fraction form
    21,108.25/29,129.70 = 11,676.79/x
  3. Step 3: Cross multiply
    21,108.25x = 29,129.70 × 11,676.79
  4. Step 4: Simplify right side
    21,108.25x = 340,141,389.66
  5. Step 5: Solve for x
    x = 340,141,389.66/21,108.25
  6. Step 6: Final answer
    x = 16,114.14

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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.