Home / 20,511.12-28,303.92-12,126

Finding the Fourth Proportional to 20,511.12, 28,303.92 and 12,126

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Solution

The fourth proportional to 20,511.12, 28,303.92 and 12,126 is: 16,733.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.12 : 28,303.92 = 12,126 : x
  2. Step 2: Convert to fraction form
    20,511.12/28,303.92 = 12,126/x
  3. Step 3: Cross multiply
    20,511.12x = 28,303.92 × 12,126
  4. Step 4: Simplify right side
    20,511.12x = 343,213,333.92
  5. Step 5: Solve for x
    x = 343,213,333.92/20,511.12
  6. Step 6: Final answer
    x = 16,733.04

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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.