Home / 7,847.87-11,771.81-2,918.75

Finding the Fourth Proportional to 7,847.87, 11,771.81 and 2,918.75

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Solution

The fourth proportional to 7,847.87, 11,771.81 and 2,918.75 is: 4,378.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,847.87 : 11,771.81 = 2,918.75 : x
  2. Step 2: Convert to fraction form
    7,847.87/11,771.81 = 2,918.75/x
  3. Step 3: Cross multiply
    7,847.87x = 11,771.81 × 2,918.75
  4. Step 4: Simplify right side
    7,847.87x = 34,358,970.44
  5. Step 5: Solve for x
    x = 34,358,970.44/7,847.87
  6. Step 6: Final answer
    x = 4,378.13

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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.