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Finding the Fourth Proportional to 18,716.73, 28,066.81 and 7,021.74

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Solution

The fourth proportional to 18,716.73, 28,066.81 and 7,021.74 is: 10,529.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.73 : 28,066.81 = 7,021.74 : x
  2. Step 2: Convert to fraction form
    18,716.73/28,066.81 = 7,021.74/x
  3. Step 3: Cross multiply
    18,716.73x = 28,066.81 × 7,021.74
  4. Step 4: Simplify right side
    18,716.73x = 197,077,842.45
  5. Step 5: Solve for x
    x = 197,077,842.45/18,716.73
  6. Step 6: Final answer
    x = 10,529.50

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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.