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Finding the Fourth Proportional to 8,661.80, 12,994.07 and 2,817.05

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Solution

The fourth proportional to 8,661.80, 12,994.07 and 2,817.05 is: 4,226.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.80 : 12,994.07 = 2,817.05 : x
  2. Step 2: Convert to fraction form
    8,661.80/12,994.07 = 2,817.05/x
  3. Step 3: Cross multiply
    8,661.80x = 12,994.07 × 2,817.05
  4. Step 4: Simplify right side
    8,661.80x = 36,604,865.84
  5. Step 5: Solve for x
    x = 36,604,865.84/8,661.80
  6. Step 6: Final answer
    x = 4,226.01

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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.