Home / 20,511.86-28,305.92-12,012.93

Finding the Fourth Proportional to 20,511.86, 28,305.92 and 12,012.93

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Solution

The fourth proportional to 20,511.86, 28,305.92 and 12,012.93 is: 16,577.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.86 : 28,305.92 = 12,012.93 : x
  2. Step 2: Convert to fraction form
    20,511.86/28,305.92 = 12,012.93/x
  3. Step 3: Cross multiply
    20,511.86x = 28,305.92 × 12,012.93
  4. Step 4: Simplify right side
    20,511.86x = 340,037,065.58
  5. Step 5: Solve for x
    x = 340,037,065.58/20,511.86
  6. Step 6: Final answer
    x = 16,577.59

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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.