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Finding the Fourth Proportional to 26,619.60, 39,922.20 and 7,899.60

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Solution

The fourth proportional to 26,619.60, 39,922.20 and 7,899.60 is: 11,847.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,619.60 : 39,922.20 = 7,899.60 : x
  2. Step 2: Convert to fraction form
    26,619.60/39,922.20 = 7,899.60/x
  3. Step 3: Cross multiply
    26,619.60x = 39,922.20 × 7,899.60
  4. Step 4: Simplify right side
    26,619.60x = 315,369,411.12
  5. Step 5: Solve for x
    x = 315,369,411.12/26,619.60
  6. Step 6: Final answer
    x = 11,847.26

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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.