Home / 7,985.28-11,977.96-2,787.50

Finding the Fourth Proportional to 7,985.28, 11,977.96 and 2,787.50

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Solution

The fourth proportional to 7,985.28, 11,977.96 and 2,787.50 is: 4,181.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.28 : 11,977.96 = 2,787.50 : x
  2. Step 2: Convert to fraction form
    7,985.28/11,977.96 = 2,787.50/x
  3. Step 3: Cross multiply
    7,985.28x = 11,977.96 × 2,787.50
  4. Step 4: Simplify right side
    7,985.28x = 33,388,563.50
  5. Step 5: Solve for x
    x = 33,388,563.50/7,985.28
  6. Step 6: Final answer
    x = 4,181.26

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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.