Home / 20,666.13-28,519.39-11,235.03

Finding the Fourth Proportional to 20,666.13, 28,519.39 and 11,235.03

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Solution

The fourth proportional to 20,666.13, 28,519.39 and 11,235.03 is: 15,504.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.13 : 28,519.39 = 11,235.03 : x
  2. Step 2: Convert to fraction form
    20,666.13/28,519.39 = 11,235.03/x
  3. Step 3: Cross multiply
    20,666.13x = 28,519.39 × 11,235.03
  4. Step 4: Simplify right side
    20,666.13x = 320,416,202.23
  5. Step 5: Solve for x
    x = 320,416,202.23/20,666.13
  6. Step 6: Final answer
    x = 15,504.41

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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.