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Finding the Fourth Proportional to 9,990.95, 13,782.30 and 8,104.73

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Solution

The fourth proportional to 9,990.95, 13,782.30 and 8,104.73 is: 11,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.95 : 13,782.30 = 8,104.73 : x
  2. Step 2: Convert to fraction form
    9,990.95/13,782.30 = 8,104.73/x
  3. Step 3: Cross multiply
    9,990.95x = 13,782.30 × 8,104.73
  4. Step 4: Simplify right side
    9,990.95x = 111,701,820.28
  5. Step 5: Solve for x
    x = 111,701,820.28/9,990.95
  6. Step 6: Final answer
    x = 11,180.30

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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.