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Finding the Fourth Proportional to 8,161.03, 11,265.78 and 5,181.45

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Solution

The fourth proportional to 8,161.03, 11,265.78 and 5,181.45 is: 7,152.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,161.03 : 11,265.78 = 5,181.45 : x
  2. Step 2: Convert to fraction form
    8,161.03/11,265.78 = 5,181.45/x
  3. Step 3: Cross multiply
    8,161.03x = 11,265.78 × 5,181.45
  4. Step 4: Simplify right side
    8,161.03x = 58,373,075.78
  5. Step 5: Solve for x
    x = 58,373,075.78/8,161.03
  6. Step 6: Final answer
    x = 7,152.66

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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.