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Finding the Fourth Proportional to 7,215.25, 9,957.05 and 4,071.37

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Solution

The fourth proportional to 7,215.25, 9,957.05 and 4,071.37 is: 5,618.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.25 : 9,957.05 = 4,071.37 : x
  2. Step 2: Convert to fraction form
    7,215.25/9,957.05 = 4,071.37/x
  3. Step 3: Cross multiply
    7,215.25x = 9,957.05 × 4,071.37
  4. Step 4: Simplify right side
    7,215.25x = 40,538,814.30
  5. Step 5: Solve for x
    x = 40,538,814.30/7,215.25
  6. Step 6: Final answer
    x = 5,618.49

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