Home / 20,898-28,839.24-12,519.36

Finding the Fourth Proportional to 20,898, 28,839.24 and 12,519.36

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Solution

The fourth proportional to 20,898, 28,839.24 and 12,519.36 is: 17,276.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898 : 28,839.24 = 12,519.36 : x
  2. Step 2: Convert to fraction form
    20,898/28,839.24 = 12,519.36/x
  3. Step 3: Cross multiply
    20,898x = 28,839.24 × 12,519.36
  4. Step 4: Simplify right side
    20,898x = 361,048,827.69
  5. Step 5: Solve for x
    x = 361,048,827.69/20,898
  6. Step 6: Final answer
    x = 17,276.72

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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.