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Finding the Fourth Proportional to 28,779.70, 43,169.64 and 8,003.20

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Solution

The fourth proportional to 28,779.70, 43,169.64 and 8,003.20 is: 12,004.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,779.70 : 43,169.64 = 8,003.20 : x
  2. Step 2: Convert to fraction form
    28,779.70/43,169.64 = 8,003.20/x
  3. Step 3: Cross multiply
    28,779.70x = 43,169.64 × 8,003.20
  4. Step 4: Simplify right side
    28,779.70x = 345,495,262.85
  5. Step 5: Solve for x
    x = 345,495,262.85/28,779.70
  6. Step 6: Final answer
    x = 12,004.83

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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.