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Finding the Fourth Proportional to 7,920.69, 11,878.73 and 2,372.60

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Solution

The fourth proportional to 7,920.69, 11,878.73 and 2,372.60 is: 3,558.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.69 : 11,878.73 = 2,372.60 : x
  2. Step 2: Convert to fraction form
    7,920.69/11,878.73 = 2,372.60/x
  3. Step 3: Cross multiply
    7,920.69x = 11,878.73 × 2,372.60
  4. Step 4: Simplify right side
    7,920.69x = 28,183,415.40
  5. Step 5: Solve for x
    x = 28,183,415.40/7,920.69
  6. Step 6: Final answer
    x = 3,558.20

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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.