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Finding the Fourth Proportional to 14,907.72, 20,574.54 and 8,619.96

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Solution

The fourth proportional to 14,907.72, 20,574.54 and 8,619.96 is: 11,896.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,907.72 : 20,574.54 = 8,619.96 : x
  2. Step 2: Convert to fraction form
    14,907.72/20,574.54 = 8,619.96/x
  3. Step 3: Cross multiply
    14,907.72x = 20,574.54 × 8,619.96
  4. Step 4: Simplify right side
    14,907.72x = 177,351,711.82
  5. Step 5: Solve for x
    x = 177,351,711.82/14,907.72
  6. Step 6: Final answer
    x = 11,896.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.