Home / 13,908.40-19,195.55-7,940.42

Finding the Fourth Proportional to 13,908.40, 19,195.55 and 7,940.42

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Solution

The fourth proportional to 13,908.40, 19,195.55 and 7,940.42 is: 10,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908.40 : 19,195.55 = 7,940.42 : x
  2. Step 2: Convert to fraction form
    13,908.40/19,195.55 = 7,940.42/x
  3. Step 3: Cross multiply
    13,908.40x = 19,195.55 × 7,940.42
  4. Step 4: Simplify right side
    13,908.40x = 152,420,729.13
  5. Step 5: Solve for x
    x = 152,420,729.13/13,908.40
  6. Step 6: Final answer
    x = 10,958.90

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1.5x scale

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.