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Finding the Fourth Proportional to 28,830.40, 43,149.60 and 20,910.40

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Solution

The fourth proportional to 28,830.40, 43,149.60 and 20,910.40 is: 31,295.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,830.40 : 43,149.60 = 20,910.40 : x
  2. Step 2: Convert to fraction form
    28,830.40/43,149.60 = 20,910.40/x
  3. Step 3: Cross multiply
    28,830.40x = 43,149.60 × 20,910.40
  4. Step 4: Simplify right side
    28,830.40x = 902,275,395.84
  5. Step 5: Solve for x
    x = 902,275,395.84/28,830.40
  6. Step 6: Final answer
    x = 31,295.97

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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.