Home / 20,777.72-31,167.21-8,126.97

Finding the Fourth Proportional to 20,777.72, 31,167.21 and 8,126.97

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Solution

The fourth proportional to 20,777.72, 31,167.21 and 8,126.97 is: 12,190.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.72 : 31,167.21 = 8,126.97 : x
  2. Step 2: Convert to fraction form
    20,777.72/31,167.21 = 8,126.97/x
  3. Step 3: Cross multiply
    20,777.72x = 31,167.21 × 8,126.97
  4. Step 4: Simplify right side
    20,777.72x = 253,294,980.65
  5. Step 5: Solve for x
    x = 253,294,980.65/20,777.72
  6. Step 6: Final answer
    x = 12,190.70

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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.