Home / 13,109.06-17,988.76-11,921.06

Finding the Fourth Proportional to 13,109.06, 17,988.76 and 11,921.06

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Solution

The fourth proportional to 13,109.06, 17,988.76 and 11,921.06 is: 16,358.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.06 : 17,988.76 = 11,921.06 : x
  2. Step 2: Convert to fraction form
    13,109.06/17,988.76 = 11,921.06/x
  3. Step 3: Cross multiply
    13,109.06x = 17,988.76 × 11,921.06
  4. Step 4: Simplify right side
    13,109.06x = 214,445,087.29
  5. Step 5: Solve for x
    x = 214,445,087.29/13,109.06
  6. Step 6: Final answer
    x = 16,358.54

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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.