Home / 13,628.79-18,790.38-9,145.44

Finding the Fourth Proportional to 13,628.79, 18,790.38 and 9,145.44

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Solution

The fourth proportional to 13,628.79, 18,790.38 and 9,145.44 is: 12,609.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.79 : 18,790.38 = 9,145.44 : x
  2. Step 2: Convert to fraction form
    13,628.79/18,790.38 = 9,145.44/x
  3. Step 3: Cross multiply
    13,628.79x = 18,790.38 × 9,145.44
  4. Step 4: Simplify right side
    13,628.79x = 171,846,292.87
  5. Step 5: Solve for x
    x = 171,846,292.87/13,628.79
  6. Step 6: Final answer
    x = 12,609.06

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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.