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Finding the Fourth Proportional to 7,896.28, 11,775.79 and 7,790.35

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Solution

The fourth proportional to 7,896.28, 11,775.79 and 7,790.35 is: 11,617.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,896.28 : 11,775.79 = 7,790.35 : x
  2. Step 2: Convert to fraction form
    7,896.28/11,775.79 = 7,790.35/x
  3. Step 3: Cross multiply
    7,896.28x = 11,775.79 × 7,790.35
  4. Step 4: Simplify right side
    7,896.28x = 91,737,525.63
  5. Step 5: Solve for x
    x = 91,737,525.63/7,896.28
  6. Step 6: Final answer
    x = 11,617.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.