Home / 13,109.56-17,989.45-11,921.56

Finding the Fourth Proportional to 13,109.56, 17,989.45 and 11,921.56

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Solution

The fourth proportional to 13,109.56, 17,989.45 and 11,921.56 is: 16,359.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.56 : 17,989.45 = 11,921.56 : x
  2. Step 2: Convert to fraction form
    13,109.56/17,989.45 = 11,921.56/x
  3. Step 3: Cross multiply
    13,109.56x = 17,989.45 × 11,921.56
  4. Step 4: Simplify right side
    13,109.56x = 214,462,307.54
  5. Step 5: Solve for x
    x = 214,462,307.54/13,109.56
  6. Step 6: Final answer
    x = 16,359.23

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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.