Home / 13,145.28-18,147.11-8,370.03

Finding the Fourth Proportional to 13,145.28, 18,147.11 and 8,370.03

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Solution

The fourth proportional to 13,145.28, 18,147.11 and 8,370.03 is: 11,554.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.28 : 18,147.11 = 8,370.03 : x
  2. Step 2: Convert to fraction form
    13,145.28/18,147.11 = 8,370.03/x
  3. Step 3: Cross multiply
    13,145.28x = 18,147.11 × 8,370.03
  4. Step 4: Simplify right side
    13,145.28x = 151,891,813.26
  5. Step 5: Solve for x
    x = 151,891,813.26/13,145.28
  6. Step 6: Final answer
    x = 11,554.86

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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.