Home / 11,817.12-17,720.10-4,419.60

Finding the Fourth Proportional to 11,817.12, 17,720.10 and 4,419.60

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Solution

The fourth proportional to 11,817.12, 17,720.10 and 4,419.60 is: 6,627.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,817.12 : 17,720.10 = 4,419.60 : x
  2. Step 2: Convert to fraction form
    11,817.12/17,720.10 = 4,419.60/x
  3. Step 3: Cross multiply
    11,817.12x = 17,720.10 × 4,419.60
  4. Step 4: Simplify right side
    11,817.12x = 78,315,753.96
  5. Step 5: Solve for x
    x = 78,315,753.96/11,817.12
  6. Step 6: Final answer
    x = 6,627.31

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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.