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Finding the Fourth Proportional to 28,550.55, 42,828.53 and 7,774.05

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Solution

The fourth proportional to 28,550.55, 42,828.53 and 7,774.05 is: 11,661.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,550.55 : 42,828.53 = 7,774.05 : x
  2. Step 2: Convert to fraction form
    28,550.55/42,828.53 = 7,774.05/x
  3. Step 3: Cross multiply
    28,550.55x = 42,828.53 × 7,774.05
  4. Step 4: Simplify right side
    28,550.55x = 332,951,094.78
  5. Step 5: Solve for x
    x = 332,951,094.78/28,550.55
  6. Step 6: Final answer
    x = 11,661.81

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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.