Home / 7,878.32-11,811.66-2,611.42

Finding the Fourth Proportional to 7,878.32, 11,811.66 and 2,611.42

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Solution

The fourth proportional to 7,878.32, 11,811.66 and 2,611.42 is: 3,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.32 : 11,811.66 = 2,611.42 : x
  2. Step 2: Convert to fraction form
    7,878.32/11,811.66 = 2,611.42/x
  3. Step 3: Cross multiply
    7,878.32x = 11,811.66 × 2,611.42
  4. Step 4: Simplify right side
    7,878.32x = 30,845,205.16
  5. Step 5: Solve for x
    x = 30,845,205.16/7,878.32
  6. Step 6: Final answer
    x = 3,915.20

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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.