Home / 20,511.23-28,305.72-12,011.49

Finding the Fourth Proportional to 20,511.23, 28,305.72 and 12,011.49

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Solution

The fourth proportional to 20,511.23, 28,305.72 and 12,011.49 is: 16,575.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.23 : 28,305.72 = 12,011.49 : x
  2. Step 2: Convert to fraction form
    20,511.23/28,305.72 = 12,011.49/x
  3. Step 3: Cross multiply
    20,511.23x = 28,305.72 × 12,011.49
  4. Step 4: Simplify right side
    20,511.23x = 339,993,872.72
  5. Step 5: Solve for x
    x = 339,993,872.72/20,511.23
  6. Step 6: Final answer
    x = 16,575.99

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1.5x scale

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.