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Finding the Fourth Proportional to 7,277.80, 10,921.02 and 2,894.08

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Solution

The fourth proportional to 7,277.80, 10,921.02 and 2,894.08 is: 4,342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,277.80 : 10,921.02 = 2,894.08 : x
  2. Step 2: Convert to fraction form
    7,277.80/10,921.02 = 2,894.08/x
  3. Step 3: Cross multiply
    7,277.80x = 10,921.02 × 2,894.08
  4. Step 4: Simplify right side
    7,277.80x = 31,606,305.56
  5. Step 5: Solve for x
    x = 31,606,305.56/7,277.80
  6. Step 6: Final answer
    x = 4,342.84

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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.