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Finding the Fourth Proportional to 18,777.61, 25,911.32 and 11,222.44

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Solution

The fourth proportional to 18,777.61, 25,911.32 and 11,222.44 is: 15,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.61 : 25,911.32 = 11,222.44 : x
  2. Step 2: Convert to fraction form
    18,777.61/25,911.32 = 11,222.44/x
  3. Step 3: Cross multiply
    18,777.61x = 25,911.32 × 11,222.44
  4. Step 4: Simplify right side
    18,777.61x = 290,788,197.30
  5. Step 5: Solve for x
    x = 290,788,197.30/18,777.61
  6. Step 6: Final answer
    x = 15,485.90

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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.