Home / 13,721.51-18,918.47-11,201.06

Finding the Fourth Proportional to 13,721.51, 18,918.47 and 11,201.06

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Solution

The fourth proportional to 13,721.51, 18,918.47 and 11,201.06 is: 15,443.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.51 : 18,918.47 = 11,201.06 : x
  2. Step 2: Convert to fraction form
    13,721.51/18,918.47 = 11,201.06/x
  3. Step 3: Cross multiply
    13,721.51x = 18,918.47 × 11,201.06
  4. Step 4: Simplify right side
    13,721.51x = 211,906,766.98
  5. Step 5: Solve for x
    x = 211,906,766.98/13,721.51
  6. Step 6: Final answer
    x = 15,443.41

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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.