Home / 13,489.09-18,515.91-11,963.66

Finding the Fourth Proportional to 13,489.09, 18,515.91 and 11,963.66

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Solution

The fourth proportional to 13,489.09, 18,515.91 and 11,963.66 is: 16,422.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.09 : 18,515.91 = 11,963.66 : x
  2. Step 2: Convert to fraction form
    13,489.09/18,515.91 = 11,963.66/x
  3. Step 3: Cross multiply
    13,489.09x = 18,515.91 × 11,963.66
  4. Step 4: Simplify right side
    13,489.09x = 221,517,975.63
  5. Step 5: Solve for x
    x = 221,517,975.63/13,489.09
  6. Step 6: Final answer
    x = 16,422.01

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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.