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Finding the Fourth Proportional to 18,694.37, 28,040.45 and 7,006.61

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Solution

The fourth proportional to 18,694.37, 28,040.45 and 7,006.61 is: 10,509.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.37 : 28,040.45 = 7,006.61 : x
  2. Step 2: Convert to fraction form
    18,694.37/28,040.45 = 7,006.61/x
  3. Step 3: Cross multiply
    18,694.37x = 28,040.45 × 7,006.61
  4. Step 4: Simplify right side
    18,694.37x = 196,468,322.14
  5. Step 5: Solve for x
    x = 196,468,322.14/18,694.37
  6. Step 6: Final answer
    x = 10,509.49

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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.