Home / 13,109.36-18,107.20-9,518.64

Finding the Fourth Proportional to 13,109.36, 18,107.20 and 9,518.64

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Solution

The fourth proportional to 13,109.36, 18,107.20 and 9,518.64 is: 13,147.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.36 : 18,107.20 = 9,518.64 : x
  2. Step 2: Convert to fraction form
    13,109.36/18,107.20 = 9,518.64/x
  3. Step 3: Cross multiply
    13,109.36x = 18,107.20 × 9,518.64
  4. Step 4: Simplify right side
    13,109.36x = 172,355,918.21
  5. Step 5: Solve for x
    x = 172,355,918.21/13,109.36
  6. Step 6: Final answer
    x = 13,147.55

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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.