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Finding the Fourth Proportional to 18,779.82, 25,919.22 and 10,820.70

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Solution

The fourth proportional to 18,779.82, 25,919.22 and 10,820.70 is: 14,934.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.82 : 25,919.22 = 10,820.70 : x
  2. Step 2: Convert to fraction form
    18,779.82/25,919.22 = 10,820.70/x
  3. Step 3: Cross multiply
    18,779.82x = 25,919.22 × 10,820.70
  4. Step 4: Simplify right side
    18,779.82x = 280,464,103.85
  5. Step 5: Solve for x
    x = 280,464,103.85/18,779.82
  6. Step 6: Final answer
    x = 14,934.33

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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.