Home / 13,138.88-19,707.60-7,943.36

Finding the Fourth Proportional to 13,138.88, 19,707.60 and 7,943.36

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Solution

The fourth proportional to 13,138.88, 19,707.60 and 7,943.36 is: 11,914.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.88 : 19,707.60 = 7,943.36 : x
  2. Step 2: Convert to fraction form
    13,138.88/19,707.60 = 7,943.36/x
  3. Step 3: Cross multiply
    13,138.88x = 19,707.60 × 7,943.36
  4. Step 4: Simplify right side
    13,138.88x = 156,544,561.54
  5. Step 5: Solve for x
    x = 156,544,561.54/13,138.88
  6. Step 6: Final answer
    x = 11,914.60

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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.