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Finding the Fourth Proportional to 28,965, 43,449.34 and 8,190.12

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Solution

The fourth proportional to 28,965, 43,449.34 and 8,190.12 is: 12,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,965 : 43,449.34 = 8,190.12 : x
  2. Step 2: Convert to fraction form
    28,965/43,449.34 = 8,190.12/x
  3. Step 3: Cross multiply
    28,965x = 43,449.34 × 8,190.12
  4. Step 4: Simplify right side
    28,965x = 355,855,308.52
  5. Step 5: Solve for x
    x = 355,855,308.52/28,965
  6. Step 6: Final answer
    x = 12,285.70

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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.