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Finding the Fourth Proportional to 7,884.76, 11,826.60 and 2,690.50

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Solution

The fourth proportional to 7,884.76, 11,826.60 and 2,690.50 is: 4,035.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,884.76 : 11,826.60 = 2,690.50 : x
  2. Step 2: Convert to fraction form
    7,884.76/11,826.60 = 2,690.50/x
  3. Step 3: Cross multiply
    7,884.76x = 11,826.60 × 2,690.50
  4. Step 4: Simplify right side
    7,884.76x = 31,819,467.30
  5. Step 5: Solve for x
    x = 31,819,467.30/7,884.76
  6. Step 6: Final answer
    x = 4,035.57

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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.