Home / 4,891.20-7,338.60-1,971.60

Finding the Fourth Proportional to 4,891.20, 7,338.60 and 1,971.60

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Solution

The fourth proportional to 4,891.20, 7,338.60 and 1,971.60 is: 2,958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.20 : 7,338.60 = 1,971.60 : x
  2. Step 2: Convert to fraction form
    4,891.20/7,338.60 = 1,971.60/x
  3. Step 3: Cross multiply
    4,891.20x = 7,338.60 × 1,971.60
  4. Step 4: Simplify right side
    4,891.20x = 14,468,783.76
  5. Step 5: Solve for x
    x = 14,468,783.76/4,891.20
  6. Step 6: Final answer
    x = 2,958.13

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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.