Home / 13,721.88-18,918.99-11,201.43

Finding the Fourth Proportional to 13,721.88, 18,918.99 and 11,201.43

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Solution

The fourth proportional to 13,721.88, 18,918.99 and 11,201.43 is: 15,443.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.88 : 18,918.99 = 11,201.43 : x
  2. Step 2: Convert to fraction form
    13,721.88/18,918.99 = 11,201.43/x
  3. Step 3: Cross multiply
    13,721.88x = 18,918.99 × 11,201.43
  4. Step 4: Simplify right side
    13,721.88x = 211,919,742.16
  5. Step 5: Solve for x
    x = 211,919,742.16/13,721.88
  6. Step 6: Final answer
    x = 15,443.93

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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.