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Finding the Fourth Proportional to 18,812.69, 28,222.49 and 15,333.56

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Solution

The fourth proportional to 18,812.69, 28,222.49 and 15,333.56 is: 23,003.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.69 : 28,222.49 = 15,333.56 : x
  2. Step 2: Convert to fraction form
    18,812.69/28,222.49 = 15,333.56/x
  3. Step 3: Cross multiply
    18,812.69x = 28,222.49 × 15,333.56
  4. Step 4: Simplify right side
    18,812.69x = 432,751,243.76
  5. Step 5: Solve for x
    x = 432,751,243.76/18,812.69
  6. Step 6: Final answer
    x = 23,003.16

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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.