Home / 20,780.19-28,676.77-11,348.75

Finding the Fourth Proportional to 20,780.19, 28,676.77 and 11,348.75

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Solution

The fourth proportional to 20,780.19, 28,676.77 and 11,348.75 is: 15,661.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.19 : 28,676.77 = 11,348.75 : x
  2. Step 2: Convert to fraction form
    20,780.19/28,676.77 = 11,348.75/x
  3. Step 3: Cross multiply
    20,780.19x = 28,676.77 × 11,348.75
  4. Step 4: Simplify right side
    20,780.19x = 325,445,536.86
  5. Step 5: Solve for x
    x = 325,445,536.86/20,780.19
  6. Step 6: Final answer
    x = 15,661.34

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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.