Home / 20,776.98-31,162.74-5,785.09

Finding the Fourth Proportional to 20,776.98, 31,162.74 and 5,785.09

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Solution

The fourth proportional to 20,776.98, 31,162.74 and 5,785.09 is: 8,676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.98 : 31,162.74 = 5,785.09 : x
  2. Step 2: Convert to fraction form
    20,776.98/31,162.74 = 5,785.09/x
  3. Step 3: Cross multiply
    20,776.98x = 31,162.74 × 5,785.09
  4. Step 4: Simplify right side
    20,776.98x = 180,279,255.55
  5. Step 5: Solve for x
    x = 180,279,255.55/20,776.98
  6. Step 6: Final answer
    x = 8,676.87

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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.