Home / 19,640.10-27,107.22-11,680.77

Finding the Fourth Proportional to 19,640.10, 27,107.22 and 11,680.77

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Solution

The fourth proportional to 19,640.10, 27,107.22 and 11,680.77 is: 16,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.10 : 27,107.22 = 11,680.77 : x
  2. Step 2: Convert to fraction form
    19,640.10/27,107.22 = 11,680.77/x
  3. Step 3: Cross multiply
    19,640.10x = 27,107.22 × 11,680.77
  4. Step 4: Simplify right side
    19,640.10x = 316,633,202.16
  5. Step 5: Solve for x
    x = 316,633,202.16/19,640.10
  6. Step 6: Final answer
    x = 16,121.77

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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.