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Finding the Fourth Proportional to 18,525.78, 27,788.73 and 4,485.78

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Solution

The fourth proportional to 18,525.78, 27,788.73 and 4,485.78 is: 6,728.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,525.78 : 27,788.73 = 4,485.78 : x
  2. Step 2: Convert to fraction form
    18,525.78/27,788.73 = 4,485.78/x
  3. Step 3: Cross multiply
    18,525.78x = 27,788.73 × 4,485.78
  4. Step 4: Simplify right side
    18,525.78x = 124,654,129.26
  5. Step 5: Solve for x
    x = 124,654,129.26/18,525.78
  6. Step 6: Final answer
    x = 6,728.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.