Home / 20,910.22-28,855.14-11,478.94

Finding the Fourth Proportional to 20,910.22, 28,855.14 and 11,478.94

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Solution

The fourth proportional to 20,910.22, 28,855.14 and 11,478.94 is: 15,840.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.22 : 28,855.14 = 11,478.94 : x
  2. Step 2: Convert to fraction form
    20,910.22/28,855.14 = 11,478.94/x
  3. Step 3: Cross multiply
    20,910.22x = 28,855.14 × 11,478.94
  4. Step 4: Simplify right side
    20,910.22x = 331,226,420.75
  5. Step 5: Solve for x
    x = 331,226,420.75/20,910.22
  6. Step 6: Final answer
    x = 15,840.41

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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.