Home / 13,872.12-19,143.54-8,912.76

Finding the Fourth Proportional to 13,872.12, 19,143.54 and 8,912.76

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Solution

The fourth proportional to 13,872.12, 19,143.54 and 8,912.76 is: 12,299.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872.12 : 19,143.54 = 8,912.76 : x
  2. Step 2: Convert to fraction form
    13,872.12/19,143.54 = 8,912.76/x
  3. Step 3: Cross multiply
    13,872.12x = 19,143.54 × 8,912.76
  4. Step 4: Simplify right side
    13,872.12x = 170,621,777.57
  5. Step 5: Solve for x
    x = 170,621,777.57/13,872.12
  6. Step 6: Final answer
    x = 12,299.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.