Home / 13,724.78-18,940.56-7,756.58

Finding the Fourth Proportional to 13,724.78, 18,940.56 and 7,756.58

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Solution

The fourth proportional to 13,724.78, 18,940.56 and 7,756.58 is: 10,704.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.78 : 18,940.56 = 7,756.58 : x
  2. Step 2: Convert to fraction form
    13,724.78/18,940.56 = 7,756.58/x
  3. Step 3: Cross multiply
    13,724.78x = 18,940.56 × 7,756.58
  4. Step 4: Simplify right side
    13,724.78x = 146,913,968.88
  5. Step 5: Solve for x
    x = 146,913,968.88/13,724.78
  6. Step 6: Final answer
    x = 10,704.29

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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.