Home / 13,709.63-18,919.31-7,422

Finding the Fourth Proportional to 13,709.63, 18,919.31 and 7,422

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Solution

The fourth proportional to 13,709.63, 18,919.31 and 7,422 is: 10,242.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.63 : 18,919.31 = 7,422 : x
  2. Step 2: Convert to fraction form
    13,709.63/18,919.31 = 7,422/x
  3. Step 3: Cross multiply
    13,709.63x = 18,919.31 × 7,422
  4. Step 4: Simplify right side
    13,709.63x = 140,419,081.71
  5. Step 5: Solve for x
    x = 140,419,081.71/13,709.63
  6. Step 6: Final answer
    x = 10,242.37

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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.