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Finding the Fourth Proportional to 8,911.60, 13,369.20 and 3,068.80

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Solution

The fourth proportional to 8,911.60, 13,369.20 and 3,068.80 is: 4,603.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.60 : 13,369.20 = 3,068.80 : x
  2. Step 2: Convert to fraction form
    8,911.60/13,369.20 = 3,068.80/x
  3. Step 3: Cross multiply
    8,911.60x = 13,369.20 × 3,068.80
  4. Step 4: Simplify right side
    8,911.60x = 41,027,400.96
  5. Step 5: Solve for x
    x = 41,027,400.96/8,911.60
  6. Step 6: Final answer
    x = 4,603.82

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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.