Home / 7,881.10-11,819.60-3,720.02

Finding the Fourth Proportional to 7,881.10, 11,819.60 and 3,720.02

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Solution

The fourth proportional to 7,881.10, 11,819.60 and 3,720.02 is: 5,579.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.10 : 11,819.60 = 3,720.02 : x
  2. Step 2: Convert to fraction form
    7,881.10/11,819.60 = 3,720.02/x
  3. Step 3: Cross multiply
    7,881.10x = 11,819.60 × 3,720.02
  4. Step 4: Simplify right side
    7,881.10x = 43,969,148.39
  5. Step 5: Solve for x
    x = 43,969,148.39/7,881.10
  6. Step 6: Final answer
    x = 5,579.06

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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.