Home / 20,853.05-28,778.43-11,903.44

Finding the Fourth Proportional to 20,853.05, 28,778.43 and 11,903.44

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Solution

The fourth proportional to 20,853.05, 28,778.43 and 11,903.44 is: 16,427.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.05 : 28,778.43 = 11,903.44 : x
  2. Step 2: Convert to fraction form
    20,853.05/28,778.43 = 11,903.44/x
  3. Step 3: Cross multiply
    20,853.05x = 28,778.43 × 11,903.44
  4. Step 4: Simplify right side
    20,853.05x = 342,562,341.45
  5. Step 5: Solve for x
    x = 342,562,341.45/20,853.05
  6. Step 6: Final answer
    x = 16,427.44

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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.