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Finding the Fourth Proportional to 19,871.46, 27,423.09 and 10,919.81

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Solution

The fourth proportional to 19,871.46, 27,423.09 and 10,919.81 is: 15,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.46 : 27,423.09 = 10,919.81 : x
  2. Step 2: Convert to fraction form
    19,871.46/27,423.09 = 10,919.81/x
  3. Step 3: Cross multiply
    19,871.46x = 27,423.09 × 10,919.81
  4. Step 4: Simplify right side
    19,871.46x = 299,455,000.97
  5. Step 5: Solve for x
    x = 299,455,000.97/19,871.46
  6. Step 6: Final answer
    x = 15,069.60

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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.