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Finding the Fourth Proportional to 20,757, 28,644.66 and 11,325.77

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Solution

The fourth proportional to 20,757, 28,644.66 and 11,325.77 is: 15,629.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757 : 28,644.66 = 11,325.77 : x
  2. Step 2: Convert to fraction form
    20,757/28,644.66 = 11,325.77/x
  3. Step 3: Cross multiply
    20,757x = 28,644.66 × 11,325.77
  4. Step 4: Simplify right side
    20,757x = 324,422,830.89
  5. Step 5: Solve for x
    x = 324,422,830.89/20,757
  6. Step 6: Final answer
    x = 15,629.56

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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.