Home / 20,156.82-30,233.61-12,739.65

Finding the Fourth Proportional to 20,156.82, 30,233.61 and 12,739.65

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Solution

The fourth proportional to 20,156.82, 30,233.61 and 12,739.65 is: 19,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.82 : 30,233.61 = 12,739.65 : x
  2. Step 2: Convert to fraction form
    20,156.82/30,233.61 = 12,739.65/x
  3. Step 3: Cross multiply
    20,156.82x = 30,233.61 × 12,739.65
  4. Step 4: Simplify right side
    20,156.82x = 385,165,609.64
  5. Step 5: Solve for x
    x = 385,165,609.64/20,156.82
  6. Step 6: Final answer
    x = 19,108.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.