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Finding the Fourth Proportional to 18,980.67, 28,468.47 and 5,653.41

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Solution

The fourth proportional to 18,980.67, 28,468.47 and 5,653.41 is: 8,479.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.67 : 28,468.47 = 5,653.41 : x
  2. Step 2: Convert to fraction form
    18,980.67/28,468.47 = 5,653.41/x
  3. Step 3: Cross multiply
    18,980.67x = 28,468.47 × 5,653.41
  4. Step 4: Simplify right side
    18,980.67x = 160,943,932.98
  5. Step 5: Solve for x
    x = 160,943,932.98/18,980.67
  6. Step 6: Final answer
    x = 8,479.36

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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.