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Finding the Fourth Proportional to 12,491.09, 18,745.91 and 5,917.30

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Solution

The fourth proportional to 12,491.09, 18,745.91 and 5,917.30 is: 8,880.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.09 : 18,745.91 = 5,917.30 : x
  2. Step 2: Convert to fraction form
    12,491.09/18,745.91 = 5,917.30/x
  3. Step 3: Cross multiply
    12,491.09x = 18,745.91 × 5,917.30
  4. Step 4: Simplify right side
    12,491.09x = 110,925,141.17
  5. Step 5: Solve for x
    x = 110,925,141.17/12,491.09
  6. Step 6: Final answer
    x = 8,880.34

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1.5x scale

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.