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Finding the Fourth Proportional to 18,716.42, 28,066.41 and 7,021.44

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Solution

The fourth proportional to 18,716.42, 28,066.41 and 7,021.44 is: 10,529.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.42 : 28,066.41 = 7,021.44 : x
  2. Step 2: Convert to fraction form
    18,716.42/28,066.41 = 7,021.44/x
  3. Step 3: Cross multiply
    18,716.42x = 28,066.41 × 7,021.44
  4. Step 4: Simplify right side
    18,716.42x = 197,066,613.83
  5. Step 5: Solve for x
    x = 197,066,613.83/18,716.42
  6. Step 6: Final answer
    x = 10,529.08

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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.