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Finding the Fourth Proportional to 18,087.60, 27,111.60 and 6,394.80

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Solution

The fourth proportional to 18,087.60, 27,111.60 and 6,394.80 is: 9,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,087.60 : 27,111.60 = 6,394.80 : x
  2. Step 2: Convert to fraction form
    18,087.60/27,111.60 = 6,394.80/x
  3. Step 3: Cross multiply
    18,087.60x = 27,111.60 × 6,394.80
  4. Step 4: Simplify right side
    18,087.60x = 173,373,259.68
  5. Step 5: Solve for x
    x = 173,373,259.68/18,087.60
  6. Step 6: Final answer
    x = 9,585.20

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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.