Home / 20,215-27,896.88-11,831.68

Finding the Fourth Proportional to 20,215, 27,896.88 and 11,831.68

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Solution

The fourth proportional to 20,215, 27,896.88 and 11,831.68 is: 16,327.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215 : 27,896.88 = 11,831.68 : x
  2. Step 2: Convert to fraction form
    20,215/27,896.88 = 11,831.68/x
  3. Step 3: Cross multiply
    20,215x = 27,896.88 × 11,831.68
  4. Step 4: Simplify right side
    20,215x = 330,066,957.16
  5. Step 5: Solve for x
    x = 330,066,957.16/20,215
  6. Step 6: Final answer
    x = 16,327.82

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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.