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Finding the Fourth Proportional to 11,409.99, 15,745.79 and 6,374.20

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Solution

The fourth proportional to 11,409.99, 15,745.79 and 6,374.20 is: 8,796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,409.99 : 15,745.79 = 6,374.20 : x
  2. Step 2: Convert to fraction form
    11,409.99/15,745.79 = 6,374.20/x
  3. Step 3: Cross multiply
    11,409.99x = 15,745.79 × 6,374.20
  4. Step 4: Simplify right side
    11,409.99x = 100,366,814.62
  5. Step 5: Solve for x
    x = 100,366,814.62/11,409.99
  6. Step 6: Final answer
    x = 8,796.40

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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.