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Finding the Fourth Proportional to 28,751.80, 43,114.90 and 13,174.20

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Solution

The fourth proportional to 28,751.80, 43,114.90 and 13,174.20 is: 19,755.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,751.80 : 43,114.90 = 13,174.20 : x
  2. Step 2: Convert to fraction form
    28,751.80/43,114.90 = 13,174.20/x
  3. Step 3: Cross multiply
    28,751.80x = 43,114.90 × 13,174.20
  4. Step 4: Simplify right side
    28,751.80x = 568,004,315.58
  5. Step 5: Solve for x
    x = 568,004,315.58/28,751.80
  6. Step 6: Final answer
    x = 19,755.43

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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.