Home / 13,122.81-19,661.94-7,917.75

Finding the Fourth Proportional to 13,122.81, 19,661.94 and 7,917.75

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Solution

The fourth proportional to 13,122.81, 19,661.94 and 7,917.75 is: 11,863.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.81 : 19,661.94 = 7,917.75 : x
  2. Step 2: Convert to fraction form
    13,122.81/19,661.94 = 7,917.75/x
  3. Step 3: Cross multiply
    13,122.81x = 19,661.94 × 7,917.75
  4. Step 4: Simplify right side
    13,122.81x = 155,678,325.44
  5. Step 5: Solve for x
    x = 155,678,325.44/13,122.81
  6. Step 6: Final answer
    x = 11,863.19

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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.