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Finding the Fourth Proportional to 18,716.41, 28,066.43 and 7,021.43

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Solution

The fourth proportional to 18,716.41, 28,066.43 and 7,021.43 is: 10,529.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.41 : 28,066.43 = 7,021.43 : x
  2. Step 2: Convert to fraction form
    18,716.41/28,066.43 = 7,021.43/x
  3. Step 3: Cross multiply
    18,716.41x = 28,066.43 × 7,021.43
  4. Step 4: Simplify right side
    18,716.41x = 197,066,456.07
  5. Step 5: Solve for x
    x = 197,066,456.07/18,716.41
  6. Step 6: Final answer
    x = 10,529.07

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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.