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Finding the Fourth Proportional to 7,448.90, 11,172.99 and 2,768.90

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Solution

The fourth proportional to 7,448.90, 11,172.99 and 2,768.90 is: 4,153.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,448.90 : 11,172.99 = 2,768.90 : x
  2. Step 2: Convert to fraction form
    7,448.90/11,172.99 = 2,768.90/x
  3. Step 3: Cross multiply
    7,448.90x = 11,172.99 × 2,768.90
  4. Step 4: Simplify right side
    7,448.90x = 30,936,892.01
  5. Step 5: Solve for x
    x = 30,936,892.01/7,448.90
  6. Step 6: Final answer
    x = 4,153.22

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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.