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Finding the Fourth Proportional to 18,716.67, 28,066.80 and 7,021.69

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Solution

The fourth proportional to 18,716.67, 28,066.80 and 7,021.69 is: 10,529.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.67 : 28,066.80 = 7,021.69 : x
  2. Step 2: Convert to fraction form
    18,716.67/28,066.80 = 7,021.69/x
  3. Step 3: Cross multiply
    18,716.67x = 28,066.80 × 7,021.69
  4. Step 4: Simplify right side
    18,716.67x = 197,076,325.06
  5. Step 5: Solve for x
    x = 197,076,325.06/18,716.67
  6. Step 6: Final answer
    x = 10,529.45

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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.