Home / 13,108.06-17,987.39-11,920.06

Finding the Fourth Proportional to 13,108.06, 17,987.39 and 11,920.06

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Solution

The fourth proportional to 13,108.06, 17,987.39 and 11,920.06 is: 16,357.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.06 : 17,987.39 = 11,920.06 : x
  2. Step 2: Convert to fraction form
    13,108.06/17,987.39 = 11,920.06/x
  3. Step 3: Cross multiply
    13,108.06x = 17,987.39 × 11,920.06
  4. Step 4: Simplify right side
    13,108.06x = 214,410,768.04
  5. Step 5: Solve for x
    x = 214,410,768.04/13,108.06
  6. Step 6: Final answer
    x = 16,357.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.