Home / 5,515.50-7,611.39-3,158.40

Finding the Fourth Proportional to 5,515.50, 7,611.39 and 3,158.40

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Solution

The fourth proportional to 5,515.50, 7,611.39 and 3,158.40 is: 4,358.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,515.50 : 7,611.39 = 3,158.40 : x
  2. Step 2: Convert to fraction form
    5,515.50/7,611.39 = 3,158.40/x
  3. Step 3: Cross multiply
    5,515.50x = 7,611.39 × 3,158.40
  4. Step 4: Simplify right side
    5,515.50x = 24,039,814.18
  5. Step 5: Solve for x
    x = 24,039,814.18/5,515.50
  6. Step 6: Final answer
    x = 4,358.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.