Home / 13,858.90-19,120.55-7,889.09

Finding the Fourth Proportional to 13,858.90, 19,120.55 and 7,889.09

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Solution

The fourth proportional to 13,858.90, 19,120.55 and 7,889.09 is: 10,884.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,858.90 : 19,120.55 = 7,889.09 : x
  2. Step 2: Convert to fraction form
    13,858.90/19,120.55 = 7,889.09/x
  3. Step 3: Cross multiply
    13,858.90x = 19,120.55 × 7,889.09
  4. Step 4: Simplify right side
    13,858.90x = 150,843,604.75
  5. Step 5: Solve for x
    x = 150,843,604.75/13,858.90
  6. Step 6: Final answer
    x = 10,884.24

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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.