Home / 20,779.75-28,676.21-11,348.32

Finding the Fourth Proportional to 20,779.75, 28,676.21 and 11,348.32

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Solution

The fourth proportional to 20,779.75, 28,676.21 and 11,348.32 is: 15,660.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.75 : 28,676.21 = 11,348.32 : x
  2. Step 2: Convert to fraction form
    20,779.75/28,676.21 = 11,348.32/x
  3. Step 3: Cross multiply
    20,779.75x = 28,676.21 × 11,348.32
  4. Step 4: Simplify right side
    20,779.75x = 325,426,807.47
  5. Step 5: Solve for x
    x = 325,426,807.47/20,779.75
  6. Step 6: Final answer
    x = 15,660.77

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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.