Home / 11,720.40-17,611.80-6,459.60

Finding the Fourth Proportional to 11,720.40, 17,611.80 and 6,459.60

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Solution

The fourth proportional to 11,720.40, 17,611.80 and 6,459.60 is: 9,706.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.40 : 17,611.80 = 6,459.60 : x
  2. Step 2: Convert to fraction form
    11,720.40/17,611.80 = 6,459.60/x
  3. Step 3: Cross multiply
    11,720.40x = 17,611.80 × 6,459.60
  4. Step 4: Simplify right side
    11,720.40x = 113,765,183.28
  5. Step 5: Solve for x
    x = 113,765,183.28/11,720.40
  6. Step 6: Final answer
    x = 9,706.60

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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.