Home / 20,779.28-28,674.38-11,827.58

Finding the Fourth Proportional to 20,779.28, 28,674.38 and 11,827.58

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Solution

The fourth proportional to 20,779.28, 28,674.38 and 11,827.58 is: 16,321.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.28 : 28,674.38 = 11,827.58 : x
  2. Step 2: Convert to fraction form
    20,779.28/28,674.38 = 11,827.58/x
  3. Step 3: Cross multiply
    20,779.28x = 28,674.38 × 11,827.58
  4. Step 4: Simplify right side
    20,779.28x = 339,148,523.40
  5. Step 5: Solve for x
    x = 339,148,523.40/20,779.28
  6. Step 6: Final answer
    x = 16,321.48

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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.