Home / 21,107.76-29,129.16-11,676.72

Finding the Fourth Proportional to 21,107.76, 29,129.16 and 11,676.72

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Solution

The fourth proportional to 21,107.76, 29,129.16 and 11,676.72 is: 16,114.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.76 : 29,129.16 = 11,676.72 : x
  2. Step 2: Convert to fraction form
    21,107.76/29,129.16 = 11,676.72/x
  3. Step 3: Cross multiply
    21,107.76x = 29,129.16 × 11,676.72
  4. Step 4: Simplify right side
    21,107.76x = 340,133,045.16
  5. Step 5: Solve for x
    x = 340,133,045.16/21,107.76
  6. Step 6: Final answer
    x = 16,114.12

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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.