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Finding the Fourth Proportional to 18,618.40, 27,923.68 and 5,467.20

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Solution

The fourth proportional to 18,618.40, 27,923.68 and 5,467.20 is: 8,199.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.40 : 27,923.68 = 5,467.20 : x
  2. Step 2: Convert to fraction form
    18,618.40/27,923.68 = 5,467.20/x
  3. Step 3: Cross multiply
    18,618.40x = 27,923.68 × 5,467.20
  4. Step 4: Simplify right side
    18,618.40x = 152,664,343.30
  5. Step 5: Solve for x
    x = 152,664,343.30/18,618.40
  6. Step 6: Final answer
    x = 8,199.65

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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.