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Finding the Fourth Proportional to 8,855.66, 12,220.33 and 5,078.64

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Solution

The fourth proportional to 8,855.66, 12,220.33 and 5,078.64 is: 7,008.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.66 : 12,220.33 = 5,078.64 : x
  2. Step 2: Convert to fraction form
    8,855.66/12,220.33 = 5,078.64/x
  3. Step 3: Cross multiply
    8,855.66x = 12,220.33 × 5,078.64
  4. Step 4: Simplify right side
    8,855.66x = 62,062,656.75
  5. Step 5: Solve for x
    x = 62,062,656.75/8,855.66
  6. Step 6: Final answer
    x = 7,008.25

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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.