Home / 13,631.12-18,811.12-7,662.44

Finding the Fourth Proportional to 13,631.12, 18,811.12 and 7,662.44

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Solution

The fourth proportional to 13,631.12, 18,811.12 and 7,662.44 is: 10,574.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.12 : 18,811.12 = 7,662.44 : x
  2. Step 2: Convert to fraction form
    13,631.12/18,811.12 = 7,662.44/x
  3. Step 3: Cross multiply
    13,631.12x = 18,811.12 × 7,662.44
  4. Step 4: Simplify right side
    13,631.12x = 144,139,078.33
  5. Step 5: Solve for x
    x = 144,139,078.33/13,631.12
  6. Step 6: Final answer
    x = 10,574.27

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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.