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Finding the Fourth Proportional to 18,129.30, 27,193.95 and 11,928.75

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Solution

The fourth proportional to 18,129.30, 27,193.95 and 11,928.75 is: 17,893.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.30 : 27,193.95 = 11,928.75 : x
  2. Step 2: Convert to fraction form
    18,129.30/27,193.95 = 11,928.75/x
  3. Step 3: Cross multiply
    18,129.30x = 27,193.95 × 11,928.75
  4. Step 4: Simplify right side
    18,129.30x = 324,389,831.06
  5. Step 5: Solve for x
    x = 324,389,831.06/18,129.30
  6. Step 6: Final answer
    x = 17,893.13

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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.