Home / 13,286.09-18,323.78-7,977.12

Finding the Fourth Proportional to 13,286.09, 18,323.78 and 7,977.12

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Solution

The fourth proportional to 13,286.09, 18,323.78 and 7,977.12 is: 11,001.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.09 : 18,323.78 = 7,977.12 : x
  2. Step 2: Convert to fraction form
    13,286.09/18,323.78 = 7,977.12/x
  3. Step 3: Cross multiply
    13,286.09x = 18,323.78 × 7,977.12
  4. Step 4: Simplify right side
    13,286.09x = 146,170,952.03
  5. Step 5: Solve for x
    x = 146,170,952.03/13,286.09
  6. Step 6: Final answer
    x = 11,001.81

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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.