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Finding the Fourth Proportional to 8,312.94, 12,469.42 and 2,156.94

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Solution

The fourth proportional to 8,312.94, 12,469.42 and 2,156.94 is: 3,235.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.94 : 12,469.42 = 2,156.94 : x
  2. Step 2: Convert to fraction form
    8,312.94/12,469.42 = 2,156.94/x
  3. Step 3: Cross multiply
    8,312.94x = 12,469.42 × 2,156.94
  4. Step 4: Simplify right side
    8,312.94x = 26,895,790.77
  5. Step 5: Solve for x
    x = 26,895,790.77/8,312.94
  6. Step 6: Final answer
    x = 3,235.41

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Similar ratio
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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.