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Finding the Fourth Proportional to 8,455.81, 12,684.93 and 2,612.88

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Solution

The fourth proportional to 8,455.81, 12,684.93 and 2,612.88 is: 3,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.81 : 12,684.93 = 2,612.88 : x
  2. Step 2: Convert to fraction form
    8,455.81/12,684.93 = 2,612.88/x
  3. Step 3: Cross multiply
    8,455.81x = 12,684.93 × 2,612.88
  4. Step 4: Simplify right side
    8,455.81x = 33,144,199.90
  5. Step 5: Solve for x
    x = 33,144,199.90/8,455.81
  6. Step 6: Final answer
    x = 3,919.70

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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.