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Finding the Fourth Proportional to 13,872.96, 19,134.08 and 8,838.08

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Solution

The fourth proportional to 13,872.96, 19,134.08 and 8,838.08 is: 12,189.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872.96 : 19,134.08 = 8,838.08 : x
  2. Step 2: Convert to fraction form
    13,872.96/19,134.08 = 8,838.08/x
  3. Step 3: Cross multiply
    13,872.96x = 19,134.08 × 8,838.08
  4. Step 4: Simplify right side
    13,872.96x = 169,108,529.77
  5. Step 5: Solve for x
    x = 169,108,529.77/13,872.96
  6. Step 6: Final answer
    x = 12,189.79

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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.