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Finding the Fourth Proportional to 7,212.37, 9,953.76 and 4,379.09

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Solution

The fourth proportional to 7,212.37, 9,953.76 and 4,379.09 is: 6,043.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.37 : 9,953.76 = 4,379.09 : x
  2. Step 2: Convert to fraction form
    7,212.37/9,953.76 = 4,379.09/x
  3. Step 3: Cross multiply
    7,212.37x = 9,953.76 × 4,379.09
  4. Step 4: Simplify right side
    7,212.37x = 43,588,410.88
  5. Step 5: Solve for x
    x = 43,588,410.88/7,212.37
  6. Step 6: Final answer
    x = 6,043.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.