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Finding the Fourth Proportional to 20,763, 28,653.26 and 11,331.59

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Solution

The fourth proportional to 20,763, 28,653.26 and 11,331.59 is: 15,637.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763 : 28,653.26 = 11,331.59 : x
  2. Step 2: Convert to fraction form
    20,763/28,653.26 = 11,331.59/x
  3. Step 3: Cross multiply
    20,763x = 28,653.26 × 11,331.59
  4. Step 4: Simplify right side
    20,763x = 324,686,794.56
  5. Step 5: Solve for x
    x = 324,686,794.56/20,763
  6. Step 6: Final answer
    x = 15,637.76

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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.