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Finding the Fourth Proportional to 18,098.80, 27,138.60 and 6,412.40

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Solution

The fourth proportional to 18,098.80, 27,138.60 and 6,412.40 is: 9,615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,098.80 : 27,138.60 = 6,412.40 : x
  2. Step 2: Convert to fraction form
    18,098.80/27,138.60 = 6,412.40/x
  3. Step 3: Cross multiply
    18,098.80x = 27,138.60 × 6,412.40
  4. Step 4: Simplify right side
    18,098.80x = 174,023,558.64
  5. Step 5: Solve for x
    x = 174,023,558.64/18,098.80
  6. Step 6: Final answer
    x = 9,615.20

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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.