Home / 20,879.42-28,814.67-11,927.91

Finding the Fourth Proportional to 20,879.42, 28,814.67 and 11,927.91

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Solution

The fourth proportional to 20,879.42, 28,814.67 and 11,927.91 is: 16,461.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.42 : 28,814.67 = 11,927.91 : x
  2. Step 2: Convert to fraction form
    20,879.42/28,814.67 = 11,927.91/x
  3. Step 3: Cross multiply
    20,879.42x = 28,814.67 × 11,927.91
  4. Step 4: Simplify right side
    20,879.42x = 343,698,790.44
  5. Step 5: Solve for x
    x = 343,698,790.44/20,879.42
  6. Step 6: Final answer
    x = 16,461.13

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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.