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Finding the Fourth Proportional to 9,994.79, 13,792.21 and 5,518.44

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Solution

The fourth proportional to 9,994.79, 13,792.21 and 5,518.44 is: 7,615.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,994.79 : 13,792.21 = 5,518.44 : x
  2. Step 2: Convert to fraction form
    9,994.79/13,792.21 = 5,518.44/x
  3. Step 3: Cross multiply
    9,994.79x = 13,792.21 × 5,518.44
  4. Step 4: Simplify right side
    9,994.79x = 76,111,469.56
  5. Step 5: Solve for x
    x = 76,111,469.56/9,994.79
  6. Step 6: Final answer
    x = 7,615.11

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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.