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Finding the Fourth Proportional to 7,855.81, 11,783.72 and 4,936.17

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Solution

The fourth proportional to 7,855.81, 11,783.72 and 4,936.17 is: 7,404.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.81 : 11,783.72 = 4,936.17 : x
  2. Step 2: Convert to fraction form
    7,855.81/11,783.72 = 4,936.17/x
  3. Step 3: Cross multiply
    7,855.81x = 11,783.72 × 4,936.17
  4. Step 4: Simplify right side
    7,855.81x = 58,166,361.55
  5. Step 5: Solve for x
    x = 58,166,361.55/7,855.81
  6. Step 6: Final answer
    x = 7,404.25

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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.