Home / 20,778.37-28,676.23-12,394.87

Finding the Fourth Proportional to 20,778.37, 28,676.23 and 12,394.87

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Solution

The fourth proportional to 20,778.37, 28,676.23 and 12,394.87 is: 17,106.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.37 : 28,676.23 = 12,394.87 : x
  2. Step 2: Convert to fraction form
    20,778.37/28,676.23 = 12,394.87/x
  3. Step 3: Cross multiply
    20,778.37x = 28,676.23 × 12,394.87
  4. Step 4: Simplify right side
    20,778.37x = 355,438,142.94
  5. Step 5: Solve for x
    x = 355,438,142.94/20,778.37
  6. Step 6: Final answer
    x = 17,106.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.