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Finding the Fourth Proportional to 18,499.20, 27,748.80 and 16,814.40

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Solution

The fourth proportional to 18,499.20, 27,748.80 and 16,814.40 is: 25,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499.20 : 27,748.80 = 16,814.40 : x
  2. Step 2: Convert to fraction form
    18,499.20/27,748.80 = 16,814.40/x
  3. Step 3: Cross multiply
    18,499.20x = 27,748.80 × 16,814.40
  4. Step 4: Simplify right side
    18,499.20x = 466,579,422.72
  5. Step 5: Solve for x
    x = 466,579,422.72/18,499.20
  6. Step 6: Final answer
    x = 25,221.60

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Similar ratio
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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.