Home / 20,771.36-28,667.76-11,819.36

Finding the Fourth Proportional to 20,771.36, 28,667.76 and 11,819.36

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Solution

The fourth proportional to 20,771.36, 28,667.76 and 11,819.36 is: 16,312.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.36 : 28,667.76 = 11,819.36 : x
  2. Step 2: Convert to fraction form
    20,771.36/28,667.76 = 11,819.36/x
  3. Step 3: Cross multiply
    20,771.36x = 28,667.76 × 11,819.36
  4. Step 4: Simplify right side
    20,771.36x = 338,834,575.83
  5. Step 5: Solve for x
    x = 338,834,575.83/20,771.36
  6. Step 6: Final answer
    x = 16,312.59

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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.