Home / 20,871.40-28,813.62-14,192.68

Finding the Fourth Proportional to 20,871.40, 28,813.62 and 14,192.68

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Solution

The fourth proportional to 20,871.40, 28,813.62 and 14,192.68 is: 19,593.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.40 : 28,813.62 = 14,192.68 : x
  2. Step 2: Convert to fraction form
    20,871.40/28,813.62 = 14,192.68/x
  3. Step 3: Cross multiply
    20,871.40x = 28,813.62 × 14,192.68
  4. Step 4: Simplify right side
    20,871.40x = 408,942,488.30
  5. Step 5: Solve for x
    x = 408,942,488.30/20,871.40
  6. Step 6: Final answer
    x = 19,593.44

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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.