Home / 20,636.84-30,925.02-12,821.96

Finding the Fourth Proportional to 20,636.84, 30,925.02 and 12,821.96

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Solution

The fourth proportional to 20,636.84, 30,925.02 and 12,821.96 is: 19,214.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.84 : 30,925.02 = 12,821.96 : x
  2. Step 2: Convert to fraction form
    20,636.84/30,925.02 = 12,821.96/x
  3. Step 3: Cross multiply
    20,636.84x = 30,925.02 × 12,821.96
  4. Step 4: Simplify right side
    20,636.84x = 396,519,369.44
  5. Step 5: Solve for x
    x = 396,519,369.44/20,636.84
  6. Step 6: Final answer
    x = 19,214.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.