Home / 21,107.12-29,128.56-11,676.56

Finding the Fourth Proportional to 21,107.12, 29,128.56 and 11,676.56

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Solution

The fourth proportional to 21,107.12, 29,128.56 and 11,676.56 is: 16,114.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.12 : 29,128.56 = 11,676.56 : x
  2. Step 2: Convert to fraction form
    21,107.12/29,128.56 = 11,676.56/x
  3. Step 3: Cross multiply
    21,107.12x = 29,128.56 × 11,676.56
  4. Step 4: Simplify right side
    21,107.12x = 340,121,378.55
  5. Step 5: Solve for x
    x = 340,121,378.55/21,107.12
  6. Step 6: Final answer
    x = 16,114.06

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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.