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Finding the Fourth Proportional to 28,441.56, 42,662.00 and 7,379.72

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Solution

The fourth proportional to 28,441.56, 42,662.00 and 7,379.72 is: 11,069.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,441.56 : 42,662.00 = 7,379.72 : x
  2. Step 2: Convert to fraction form
    28,441.56/42,662.00 = 7,379.72/x
  3. Step 3: Cross multiply
    28,441.56x = 42,662.00 × 7,379.72
  4. Step 4: Simplify right side
    28,441.56x = 314,833,707.85
  5. Step 5: Solve for x
    x = 314,833,707.85/28,441.56
  6. Step 6: Final answer
    x = 11,069.50

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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.