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Finding the Fourth Proportional to 7,286, 10,054.72 and 3,974

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Solution

The fourth proportional to 7,286, 10,054.72 and 3,974 is: 5,484.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,286 : 10,054.72 = 3,974 : x
  2. Step 2: Convert to fraction form
    7,286/10,054.72 = 3,974/x
  3. Step 3: Cross multiply
    7,286x = 10,054.72 × 3,974
  4. Step 4: Simplify right side
    7,286x = 39,957,457.28
  5. Step 5: Solve for x
    x = 39,957,457.28/7,286
  6. Step 6: Final answer
    x = 5,484.14

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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.