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Finding the Fourth Proportional to 18,777.66, 25,911.42 and 11,222.50

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Solution

The fourth proportional to 18,777.66, 25,911.42 and 11,222.50 is: 15,486.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.66 : 25,911.42 = 11,222.50 : x
  2. Step 2: Convert to fraction form
    18,777.66/25,911.42 = 11,222.50/x
  3. Step 3: Cross multiply
    18,777.66x = 25,911.42 × 11,222.50
  4. Step 4: Simplify right side
    18,777.66x = 290,790,910.95
  5. Step 5: Solve for x
    x = 290,790,910.95/18,777.66
  6. Step 6: Final answer
    x = 15,486.00

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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.