Home / 7,419.93-11,129.75-2,978.60

Finding the Fourth Proportional to 7,419.93, 11,129.75 and 2,978.60

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Solution

The fourth proportional to 7,419.93, 11,129.75 and 2,978.60 is: 4,467.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.93 : 11,129.75 = 2,978.60 : x
  2. Step 2: Convert to fraction form
    7,419.93/11,129.75 = 2,978.60/x
  3. Step 3: Cross multiply
    7,419.93x = 11,129.75 × 2,978.60
  4. Step 4: Simplify right side
    7,419.93x = 33,151,062.04
  5. Step 5: Solve for x
    x = 33,151,062.04/7,419.93
  6. Step 6: Final answer
    x = 4,467.84

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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.