Home / 20,776.14-31,171.50-12,975.84

Finding the Fourth Proportional to 20,776.14, 31,171.50 and 12,975.84

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Solution

The fourth proportional to 20,776.14, 31,171.50 and 12,975.84 is: 19,468.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.14 : 31,171.50 = 12,975.84 : x
  2. Step 2: Convert to fraction form
    20,776.14/31,171.50 = 12,975.84/x
  3. Step 3: Cross multiply
    20,776.14x = 31,171.50 × 12,975.84
  4. Step 4: Simplify right side
    20,776.14x = 404,476,396.56
  5. Step 5: Solve for x
    x = 404,476,396.56/20,776.14
  6. Step 6: Final answer
    x = 19,468.31

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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.