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Finding the Fourth Proportional to 8,491.86, 11,719.34 and 4,907.52

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Solution

The fourth proportional to 8,491.86, 11,719.34 and 4,907.52 is: 6,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.86 : 11,719.34 = 4,907.52 : x
  2. Step 2: Convert to fraction form
    8,491.86/11,719.34 = 4,907.52/x
  3. Step 3: Cross multiply
    8,491.86x = 11,719.34 × 4,907.52
  4. Step 4: Simplify right side
    8,491.86x = 57,512,870.90
  5. Step 5: Solve for x
    x = 57,512,870.90/8,491.86
  6. Step 6: Final answer
    x = 6,772.71

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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.