Home / 20,975.85-31,474.71-8,505.09

Finding the Fourth Proportional to 20,975.85, 31,474.71 and 8,505.09

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Solution

The fourth proportional to 20,975.85, 31,474.71 and 8,505.09 is: 12,762.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.85 : 31,474.71 = 8,505.09 : x
  2. Step 2: Convert to fraction form
    20,975.85/31,474.71 = 8,505.09/x
  3. Step 3: Cross multiply
    20,975.85x = 31,474.71 × 8,505.09
  4. Step 4: Simplify right side
    20,975.85x = 267,695,241.27
  5. Step 5: Solve for x
    x = 267,695,241.27/20,975.85
  6. Step 6: Final answer
    x = 12,762.07

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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.