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Finding the Fourth Proportional to 18,716.16, 28,066.02 and 7,021.19

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Solution

The fourth proportional to 18,716.16, 28,066.02 and 7,021.19 is: 10,528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.16 : 28,066.02 = 7,021.19 : x
  2. Step 2: Convert to fraction form
    18,716.16/28,066.02 = 7,021.19/x
  3. Step 3: Cross multiply
    18,716.16x = 28,066.02 × 7,021.19
  4. Step 4: Simplify right side
    18,716.16x = 197,056,718.63
  5. Step 5: Solve for x
    x = 197,056,718.63/18,716.16
  6. Step 6: Final answer
    x = 10,528.69

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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.