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Finding the Fourth Proportional to 7,239.88, 9,991.44 and 4,256.68

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Solution

The fourth proportional to 7,239.88, 9,991.44 and 4,256.68 is: 5,874.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.88 : 9,991.44 = 4,256.68 : x
  2. Step 2: Convert to fraction form
    7,239.88/9,991.44 = 4,256.68/x
  3. Step 3: Cross multiply
    7,239.88x = 9,991.44 × 4,256.68
  4. Step 4: Simplify right side
    7,239.88x = 42,530,362.82
  5. Step 5: Solve for x
    x = 42,530,362.82/7,239.88
  6. Step 6: Final answer
    x = 5,874.46

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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.