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Finding the Fourth Proportional to 28,906.56, 43,353.72 and 9,186.84

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Solution

The fourth proportional to 28,906.56, 43,353.72 and 9,186.84 is: 13,778.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.56 : 43,353.72 = 9,186.84 : x
  2. Step 2: Convert to fraction form
    28,906.56/43,353.72 = 9,186.84/x
  3. Step 3: Cross multiply
    28,906.56x = 43,353.72 × 9,186.84
  4. Step 4: Simplify right side
    28,906.56x = 398,283,689.04
  5. Step 5: Solve for x
    x = 398,283,689.04/28,906.56
  6. Step 6: Final answer
    x = 13,778.31

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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.