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Finding the Fourth Proportional to 8,091.45, 12,138.91 and 4,583.12

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Solution

The fourth proportional to 8,091.45, 12,138.91 and 4,583.12 is: 6,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.45 : 12,138.91 = 4,583.12 : x
  2. Step 2: Convert to fraction form
    8,091.45/12,138.91 = 4,583.12/x
  3. Step 3: Cross multiply
    8,091.45x = 12,138.91 × 4,583.12
  4. Step 4: Simplify right side
    8,091.45x = 55,634,009.05
  5. Step 5: Solve for x
    x = 55,634,009.05/8,091.45
  6. Step 6: Final answer
    x = 6,875.65

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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.