Home / 20,940.98-28,898.42-11,380.82

Finding the Fourth Proportional to 20,940.98, 28,898.42 and 11,380.82

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Solution

The fourth proportional to 20,940.98, 28,898.42 and 11,380.82 is: 15,705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.98 : 28,898.42 = 11,380.82 : x
  2. Step 2: Convert to fraction form
    20,940.98/28,898.42 = 11,380.82/x
  3. Step 3: Cross multiply
    20,940.98x = 28,898.42 × 11,380.82
  4. Step 4: Simplify right side
    20,940.98x = 328,887,514.91
  5. Step 5: Solve for x
    x = 328,887,514.91/20,940.98
  6. Step 6: Final answer
    x = 15,705.45

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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.