Home / 13,905.36-19,193.42-7,940.28

Finding the Fourth Proportional to 13,905.36, 19,193.42 and 7,940.28

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Solution

The fourth proportional to 13,905.36, 19,193.42 and 7,940.28 is: 10,959.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.36 : 19,193.42 = 7,940.28 : x
  2. Step 2: Convert to fraction form
    13,905.36/19,193.42 = 7,940.28/x
  3. Step 3: Cross multiply
    13,905.36x = 19,193.42 × 7,940.28
  4. Step 4: Simplify right side
    13,905.36x = 152,401,128.96
  5. Step 5: Solve for x
    x = 152,401,128.96/13,905.36
  6. Step 6: Final answer
    x = 10,959.88

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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.