Home / 20,666.22-28,519.59-11,234.99

Finding the Fourth Proportional to 20,666.22, 28,519.59 and 11,234.99

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Solution

The fourth proportional to 20,666.22, 28,519.59 and 11,234.99 is: 15,504.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.22 : 28,519.59 = 11,234.99 : x
  2. Step 2: Convert to fraction form
    20,666.22/28,519.59 = 11,234.99/x
  3. Step 3: Cross multiply
    20,666.22x = 28,519.59 × 11,234.99
  4. Step 4: Simplify right side
    20,666.22x = 320,417,109.68
  5. Step 5: Solve for x
    x = 320,417,109.68/20,666.22
  6. Step 6: Final answer
    x = 15,504.39

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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.