Home / 13,109.09-18,090.38-7,443.79

Finding the Fourth Proportional to 13,109.09, 18,090.38 and 7,443.79

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Solution

The fourth proportional to 13,109.09, 18,090.38 and 7,443.79 is: 10,272.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.09 : 18,090.38 = 7,443.79 : x
  2. Step 2: Convert to fraction form
    13,109.09/18,090.38 = 7,443.79/x
  3. Step 3: Cross multiply
    13,109.09x = 18,090.38 × 7,443.79
  4. Step 4: Simplify right side
    13,109.09x = 134,660,862.07
  5. Step 5: Solve for x
    x = 134,660,862.07/13,109.09
  6. Step 6: Final answer
    x = 10,272.33

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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.