Home / 13,722.26-18,919.51-11,201.81

Finding the Fourth Proportional to 13,722.26, 18,919.51 and 11,201.81

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Solution

The fourth proportional to 13,722.26, 18,919.51 and 11,201.81 is: 15,444.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.26 : 18,919.51 = 11,201.81 : x
  2. Step 2: Convert to fraction form
    13,722.26/18,919.51 = 11,201.81/x
  3. Step 3: Cross multiply
    13,722.26x = 18,919.51 × 11,201.81
  4. Step 4: Simplify right side
    13,722.26x = 211,932,633.71
  5. Step 5: Solve for x
    x = 211,932,633.71/13,722.26
  6. Step 6: Final answer
    x = 15,444.45

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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.