Home / 12,978.36-19,396.43-9,475.75

Finding the Fourth Proportional to 12,978.36, 19,396.43 and 9,475.75

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Solution

The fourth proportional to 12,978.36, 19,396.43 and 9,475.75 is: 14,161.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978.36 : 19,396.43 = 9,475.75 : x
  2. Step 2: Convert to fraction form
    12,978.36/19,396.43 = 9,475.75/x
  3. Step 3: Cross multiply
    12,978.36x = 19,396.43 × 9,475.75
  4. Step 4: Simplify right side
    12,978.36x = 183,795,733.97
  5. Step 5: Solve for x
    x = 183,795,733.97/12,978.36
  6. Step 6: Final answer
    x = 14,161.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.