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Finding the Fourth Proportional to 26,511.78, 39,759.75 and 8,739.12

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Solution

The fourth proportional to 26,511.78, 39,759.75 and 8,739.12 is: 13,106.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,511.78 : 39,759.75 = 8,739.12 : x
  2. Step 2: Convert to fraction form
    26,511.78/39,759.75 = 8,739.12/x
  3. Step 3: Cross multiply
    26,511.78x = 39,759.75 × 8,739.12
  4. Step 4: Simplify right side
    26,511.78x = 347,465,226.42
  5. Step 5: Solve for x
    x = 347,465,226.42/26,511.78
  6. Step 6: Final answer
    x = 13,106.07

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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.