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Finding the Fourth Proportional to 8,640.94, 12,958.71 and 2,796.34

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Solution

The fourth proportional to 8,640.94, 12,958.71 and 2,796.34 is: 4,193.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.94 : 12,958.71 = 2,796.34 : x
  2. Step 2: Convert to fraction form
    8,640.94/12,958.71 = 2,796.34/x
  3. Step 3: Cross multiply
    8,640.94x = 12,958.71 × 2,796.34
  4. Step 4: Simplify right side
    8,640.94x = 36,236,959.12
  5. Step 5: Solve for x
    x = 36,236,959.12/8,640.94
  6. Step 6: Final answer
    x = 4,193.64

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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.