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Finding the Fourth Proportional to 8,679.54, 11,977.99 and 5,324.21

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Solution

The fourth proportional to 8,679.54, 11,977.99 and 5,324.21 is: 7,347.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.54 : 11,977.99 = 5,324.21 : x
  2. Step 2: Convert to fraction form
    8,679.54/11,977.99 = 5,324.21/x
  3. Step 3: Cross multiply
    8,679.54x = 11,977.99 × 5,324.21
  4. Step 4: Simplify right side
    8,679.54x = 63,773,247.63
  5. Step 5: Solve for x
    x = 63,773,247.63/8,679.54
  6. Step 6: Final answer
    x = 7,347.54

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1.5x scale

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.