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Finding the Fourth Proportional to 18,015.36, 27,158.16 and 16,811.15

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Solution

The fourth proportional to 18,015.36, 27,158.16 and 16,811.15 is: 25,342.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.36 : 27,158.16 = 16,811.15 : x
  2. Step 2: Convert to fraction form
    18,015.36/27,158.16 = 16,811.15/x
  3. Step 3: Cross multiply
    18,015.36x = 27,158.16 × 16,811.15
  4. Step 4: Simplify right side
    18,015.36x = 456,559,828.73
  5. Step 5: Solve for x
    x = 456,559,828.73/18,015.36
  6. Step 6: Final answer
    x = 25,342.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.