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Finding the Fourth Proportional to 5,640.84, 8,451.63 and 3,994.65

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Solution

The fourth proportional to 5,640.84, 8,451.63 and 3,994.65 is: 5,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.84 : 8,451.63 = 3,994.65 : x
  2. Step 2: Convert to fraction form
    5,640.84/8,451.63 = 3,994.65/x
  3. Step 3: Cross multiply
    5,640.84x = 8,451.63 × 3,994.65
  4. Step 4: Simplify right side
    5,640.84x = 33,761,303.78
  5. Step 5: Solve for x
    x = 33,761,303.78/5,640.84
  6. Step 6: Final answer
    x = 5,985.16

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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.