Home / 21,107.74-29,128.80-11,676.64

Finding the Fourth Proportional to 21,107.74, 29,128.80 and 11,676.64

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Solution

The fourth proportional to 21,107.74, 29,128.80 and 11,676.64 is: 16,113.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.74 : 29,128.80 = 11,676.64 : x
  2. Step 2: Convert to fraction form
    21,107.74/29,128.80 = 11,676.64/x
  3. Step 3: Cross multiply
    21,107.74x = 29,128.80 × 11,676.64
  4. Step 4: Simplify right side
    21,107.74x = 340,126,511.23
  5. Step 5: Solve for x
    x = 340,126,511.23/21,107.74
  6. Step 6: Final answer
    x = 16,113.83

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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.