Home / 13,724.36-18,940.40-7,756.55

Finding the Fourth Proportional to 13,724.36, 18,940.40 and 7,756.55

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Solution

The fourth proportional to 13,724.36, 18,940.40 and 7,756.55 is: 10,704.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.36 : 18,940.40 = 7,756.55 : x
  2. Step 2: Convert to fraction form
    13,724.36/18,940.40 = 7,756.55/x
  3. Step 3: Cross multiply
    13,724.36x = 18,940.40 × 7,756.55
  4. Step 4: Simplify right side
    13,724.36x = 146,912,159.62
  5. Step 5: Solve for x
    x = 146,912,159.62/13,724.36
  6. Step 6: Final answer
    x = 10,704.48

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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.