Home / 13,109.40-18,090.09-8,073.90

Finding the Fourth Proportional to 13,109.40, 18,090.09 and 8,073.90

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Solution

The fourth proportional to 13,109.40, 18,090.09 and 8,073.90 is: 11,141.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.40 : 18,090.09 = 8,073.90 : x
  2. Step 2: Convert to fraction form
    13,109.40/18,090.09 = 8,073.90/x
  3. Step 3: Cross multiply
    13,109.40x = 18,090.09 × 8,073.90
  4. Step 4: Simplify right side
    13,109.40x = 146,057,577.65
  5. Step 5: Solve for x
    x = 146,057,577.65/13,109.40
  6. Step 6: Final answer
    x = 11,141.44

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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.