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Finding the Fourth Proportional to 28,379.52, 42,571.73 and 7,319.37

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Solution

The fourth proportional to 28,379.52, 42,571.73 and 7,319.37 is: 10,979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.52 : 42,571.73 = 7,319.37 : x
  2. Step 2: Convert to fraction form
    28,379.52/42,571.73 = 7,319.37/x
  3. Step 3: Cross multiply
    28,379.52x = 42,571.73 × 7,319.37
  4. Step 4: Simplify right side
    28,379.52x = 311,598,313.24
  5. Step 5: Solve for x
    x = 311,598,313.24/28,379.52
  6. Step 6: Final answer
    x = 10,979.69

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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.