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Finding the Fourth Proportional to 19,872.01, 27,423.98 and 10,919.79

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Solution

The fourth proportional to 19,872.01, 27,423.98 and 10,919.79 is: 15,069.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.01 : 27,423.98 = 10,919.79 : x
  2. Step 2: Convert to fraction form
    19,872.01/27,423.98 = 10,919.79/x
  3. Step 3: Cross multiply
    19,872.01x = 27,423.98 × 10,919.79
  4. Step 4: Simplify right side
    19,872.01x = 299,464,102.56
  5. Step 5: Solve for x
    x = 299,464,102.56/19,872.01
  6. Step 6: Final answer
    x = 15,069.64

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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.