Home / 20,169.52-27,831.81-11,215.58

Finding the Fourth Proportional to 20,169.52, 27,831.81 and 11,215.58

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Solution

The fourth proportional to 20,169.52, 27,831.81 and 11,215.58 is: 15,476.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,169.52 : 27,831.81 = 11,215.58 : x
  2. Step 2: Convert to fraction form
    20,169.52/27,831.81 = 11,215.58/x
  3. Step 3: Cross multiply
    20,169.52x = 27,831.81 × 11,215.58
  4. Step 4: Simplify right side
    20,169.52x = 312,149,919.51
  5. Step 5: Solve for x
    x = 312,149,919.51/20,169.52
  6. Step 6: Final answer
    x = 15,476.32

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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.