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Finding the Fourth Proportional to 8,855.78, 12,221.01 and 5,319.05

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Solution

The fourth proportional to 8,855.78, 12,221.01 and 5,319.05 is: 7,340.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.78 : 12,221.01 = 5,319.05 : x
  2. Step 2: Convert to fraction form
    8,855.78/12,221.01 = 5,319.05/x
  3. Step 3: Cross multiply
    8,855.78x = 12,221.01 × 5,319.05
  4. Step 4: Simplify right side
    8,855.78x = 65,004,075.54
  5. Step 5: Solve for x
    x = 65,004,075.54/8,855.78
  6. Step 6: Final answer
    x = 7,340.30

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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.