Home / 20,939.45-28,895.22-11,508.01

Finding the Fourth Proportional to 20,939.45, 28,895.22 and 11,508.01

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Solution

The fourth proportional to 20,939.45, 28,895.22 and 11,508.01 is: 15,880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.45 : 28,895.22 = 11,508.01 : x
  2. Step 2: Convert to fraction form
    20,939.45/28,895.22 = 11,508.01/x
  3. Step 3: Cross multiply
    20,939.45x = 28,895.22 × 11,508.01
  4. Step 4: Simplify right side
    20,939.45x = 332,526,408.47
  5. Step 5: Solve for x
    x = 332,526,408.47/20,939.45
  6. Step 6: Final answer
    x = 15,880.38

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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.