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Finding the Fourth Proportional to 18,078.68, 27,117.74 and 6,391.96

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Solution

The fourth proportional to 18,078.68, 27,117.74 and 6,391.96 is: 9,587.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.68 : 27,117.74 = 6,391.96 : x
  2. Step 2: Convert to fraction form
    18,078.68/27,117.74 = 6,391.96/x
  3. Step 3: Cross multiply
    18,078.68x = 27,117.74 × 6,391.96
  4. Step 4: Simplify right side
    18,078.68x = 173,335,509.37
  5. Step 5: Solve for x
    x = 173,335,509.37/18,078.68
  6. Step 6: Final answer
    x = 9,587.84

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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.