Home / 7,977.28-11,968.48-2,431.68

Finding the Fourth Proportional to 7,977.28, 11,968.48 and 2,431.68

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Solution

The fourth proportional to 7,977.28, 11,968.48 and 2,431.68 is: 3,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,977.28 : 11,968.48 = 2,431.68 : x
  2. Step 2: Convert to fraction form
    7,977.28/11,968.48 = 2,431.68/x
  3. Step 3: Cross multiply
    7,977.28x = 11,968.48 × 2,431.68
  4. Step 4: Simplify right side
    7,977.28x = 29,103,513.45
  5. Step 5: Solve for x
    x = 29,103,513.45/7,977.28
  6. Step 6: Final answer
    x = 3,648.30

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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.