Home / 28,680.96-43,020.16-7,905.28

Finding the Fourth Proportional to 28,680.96, 43,020.16 and 7,905.28

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Solution

The fourth proportional to 28,680.96, 43,020.16 and 7,905.28 is: 11,857.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,680.96 : 43,020.16 = 7,905.28 : x
  2. Step 2: Convert to fraction form
    28,680.96/43,020.16 = 7,905.28/x
  3. Step 3: Cross multiply
    28,680.96x = 43,020.16 × 7,905.28
  4. Step 4: Simplify right side
    28,680.96x = 340,086,410.44
  5. Step 5: Solve for x
    x = 340,086,410.44/28,680.96
  6. Step 6: Final answer
    x = 11,857.57

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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.