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Finding the Fourth Proportional to 8,486.60, 11,712.16 and 4,902.64

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Solution

The fourth proportional to 8,486.60, 11,712.16 and 4,902.64 is: 6,766.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.60 : 11,712.16 = 4,902.64 : x
  2. Step 2: Convert to fraction form
    8,486.60/11,712.16 = 4,902.64/x
  3. Step 3: Cross multiply
    8,486.60x = 11,712.16 × 4,902.64
  4. Step 4: Simplify right side
    8,486.60x = 57,420,504.10
  5. Step 5: Solve for x
    x = 57,420,504.10/8,486.60
  6. Step 6: Final answer
    x = 6,766.02

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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.