Home / 21,108.30-29,129.67-11,676.30

Finding the Fourth Proportional to 21,108.30, 29,129.67 and 11,676.30

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Solution

The fourth proportional to 21,108.30, 29,129.67 and 11,676.30 is: 16,113.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.30 : 29,129.67 = 11,676.30 : x
  2. Step 2: Convert to fraction form
    21,108.30/29,129.67 = 11,676.30/x
  3. Step 3: Cross multiply
    21,108.30x = 29,129.67 × 11,676.30
  4. Step 4: Simplify right side
    21,108.30x = 340,126,765.82
  5. Step 5: Solve for x
    x = 340,126,765.82/21,108.30
  6. Step 6: Final answer
    x = 16,113.41

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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.