Home / 7,911.21-11,870.88-3,531.54

Finding the Fourth Proportional to 7,911.21, 11,870.88 and 3,531.54

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Solution

The fourth proportional to 7,911.21, 11,870.88 and 3,531.54 is: 5,299.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.21 : 11,870.88 = 3,531.54 : x
  2. Step 2: Convert to fraction form
    7,911.21/11,870.88 = 3,531.54/x
  3. Step 3: Cross multiply
    7,911.21x = 11,870.88 × 3,531.54
  4. Step 4: Simplify right side
    7,911.21x = 41,922,487.56
  5. Step 5: Solve for x
    x = 41,922,487.56/7,911.21
  6. Step 6: Final answer
    x = 5,299.12

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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.