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Finding the Fourth Proportional to 36,608.40, 54,918.28 and 12,919.10

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Solution

The fourth proportional to 36,608.40, 54,918.28 and 12,919.10 is: 19,380.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,608.40 : 54,918.28 = 12,919.10 : x
  2. Step 2: Convert to fraction form
    36,608.40/54,918.28 = 12,919.10/x
  3. Step 3: Cross multiply
    36,608.40x = 54,918.28 × 12,919.10
  4. Step 4: Simplify right side
    36,608.40x = 709,494,751.15
  5. Step 5: Solve for x
    x = 709,494,751.15/36,608.40
  6. Step 6: Final answer
    x = 19,380.65

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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.