Home / 20,779.74-28,676.70-11,348.64

Finding the Fourth Proportional to 20,779.74, 28,676.70 and 11,348.64

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Solution

The fourth proportional to 20,779.74, 28,676.70 and 11,348.64 is: 15,661.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.74 : 28,676.70 = 11,348.64 : x
  2. Step 2: Convert to fraction form
    20,779.74/28,676.70 = 11,348.64/x
  3. Step 3: Cross multiply
    20,779.74x = 28,676.70 × 11,348.64
  4. Step 4: Simplify right side
    20,779.74x = 325,441,544.69
  5. Step 5: Solve for x
    x = 325,441,544.69/20,779.74
  6. Step 6: Final answer
    x = 15,661.48

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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.