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Finding the Fourth Proportional to 18,078.96, 27,088.20 and 11,831.16

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Solution

The fourth proportional to 18,078.96, 27,088.20 and 11,831.16 is: 17,726.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.96 : 27,088.20 = 11,831.16 : x
  2. Step 2: Convert to fraction form
    18,078.96/27,088.20 = 11,831.16/x
  3. Step 3: Cross multiply
    18,078.96x = 27,088.20 × 11,831.16
  4. Step 4: Simplify right side
    18,078.96x = 320,484,828.31
  5. Step 5: Solve for x
    x = 320,484,828.31/18,078.96
  6. Step 6: Final answer
    x = 17,726.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.