Home / 7,977.90-11,972.32-2,783.78

Finding the Fourth Proportional to 7,977.90, 11,972.32 and 2,783.78

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Solution

The fourth proportional to 7,977.90, 11,972.32 and 2,783.78 is: 4,177.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,977.90 : 11,972.32 = 2,783.78 : x
  2. Step 2: Convert to fraction form
    7,977.90/11,972.32 = 2,783.78/x
  3. Step 3: Cross multiply
    7,977.90x = 11,972.32 × 2,783.78
  4. Step 4: Simplify right side
    7,977.90x = 33,328,231.19
  5. Step 5: Solve for x
    x = 33,328,231.19/7,977.90
  6. Step 6: Final answer
    x = 4,177.57

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1.5x scale

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.