Home / 20,782.19-28,672.30-11,827.45

Finding the Fourth Proportional to 20,782.19, 28,672.30 and 11,827.45

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Solution

The fourth proportional to 20,782.19, 28,672.30 and 11,827.45 is: 16,317.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.19 : 28,672.30 = 11,827.45 : x
  2. Step 2: Convert to fraction form
    20,782.19/28,672.30 = 11,827.45/x
  3. Step 3: Cross multiply
    20,782.19x = 28,672.30 × 11,827.45
  4. Step 4: Simplify right side
    20,782.19x = 339,120,194.64
  5. Step 5: Solve for x
    x = 339,120,194.64/20,782.19
  6. Step 6: Final answer
    x = 16,317.83

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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.