Home / 12,107.91-18,055.92-11,997.20

Finding the Fourth Proportional to 12,107.91, 18,055.92 and 11,997.20

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Solution

The fourth proportional to 12,107.91, 18,055.92 and 11,997.20 is: 17,890.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,107.91 : 18,055.92 = 11,997.20 : x
  2. Step 2: Convert to fraction form
    12,107.91/18,055.92 = 11,997.20/x
  3. Step 3: Cross multiply
    12,107.91x = 18,055.92 × 11,997.20
  4. Step 4: Simplify right side
    12,107.91x = 216,620,393.14
  5. Step 5: Solve for x
    x = 216,620,393.14/12,107.91
  6. Step 6: Final answer
    x = 17,890.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.