Home / 13,111.36-18,109.96-9,520.64

Finding the Fourth Proportional to 13,111.36, 18,109.96 and 9,520.64

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Solution

The fourth proportional to 13,111.36, 18,109.96 and 9,520.64 is: 13,150.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.36 : 18,109.96 = 9,520.64 : x
  2. Step 2: Convert to fraction form
    13,111.36/18,109.96 = 9,520.64/x
  3. Step 3: Cross multiply
    13,111.36x = 18,109.96 × 9,520.64
  4. Step 4: Simplify right side
    13,111.36x = 172,418,409.57
  5. Step 5: Solve for x
    x = 172,418,409.57/13,111.36
  6. Step 6: Final answer
    x = 13,150.31

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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.