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Finding the Fourth Proportional to 36,451.12, 54,699.72 and 20,899.12

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Solution

The fourth proportional to 36,451.12, 54,699.72 and 20,899.12 is: 31,361.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,451.12 : 54,699.72 = 20,899.12 : x
  2. Step 2: Convert to fraction form
    36,451.12/54,699.72 = 20,899.12/x
  3. Step 3: Cross multiply
    36,451.12x = 54,699.72 × 20,899.12
  4. Step 4: Simplify right side
    36,451.12x = 1,143,176,012.25
  5. Step 5: Solve for x
    x = 1,143,176,012.25/36,451.12
  6. Step 6: Final answer
    x = 31,361.89

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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.