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Finding the Fourth Proportional to 18,253.60, 27,412.80 and 13,328.80

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Solution

The fourth proportional to 18,253.60, 27,412.80 and 13,328.80 is: 20,016.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,253.60 : 27,412.80 = 13,328.80 : x
  2. Step 2: Convert to fraction form
    18,253.60/27,412.80 = 13,328.80/x
  3. Step 3: Cross multiply
    18,253.60x = 27,412.80 × 13,328.80
  4. Step 4: Simplify right side
    18,253.60x = 365,379,728.64
  5. Step 5: Solve for x
    x = 365,379,728.64/18,253.60
  6. Step 6: Final answer
    x = 20,016.86

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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.