Home / 13,426.62-18,528.70-8,121.42

Finding the Fourth Proportional to 13,426.62, 18,528.70 and 8,121.42

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Solution

The fourth proportional to 13,426.62, 18,528.70 and 8,121.42 is: 11,207.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,426.62 : 18,528.70 = 8,121.42 : x
  2. Step 2: Convert to fraction form
    13,426.62/18,528.70 = 8,121.42/x
  3. Step 3: Cross multiply
    13,426.62x = 18,528.70 × 8,121.42
  4. Step 4: Simplify right side
    13,426.62x = 150,479,354.75
  5. Step 5: Solve for x
    x = 150,479,354.75/13,426.62
  6. Step 6: Final answer
    x = 11,207.54

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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.