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Finding the Fourth Proportional to 7,857.35, 11,776.30 and 3,959.63

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Solution

The fourth proportional to 7,857.35, 11,776.30 and 3,959.63 is: 5,934.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.35 : 11,776.30 = 3,959.63 : x
  2. Step 2: Convert to fraction form
    7,857.35/11,776.30 = 3,959.63/x
  3. Step 3: Cross multiply
    7,857.35x = 11,776.30 × 3,959.63
  4. Step 4: Simplify right side
    7,857.35x = 46,629,790.77
  5. Step 5: Solve for x
    x = 46,629,790.77/7,857.35
  6. Step 6: Final answer
    x = 5,934.54

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1.5x scale

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.