Home / 27,609.80-38,105.04-20,556.32

Finding the Fourth Proportional to 27,609.80, 38,105.04 and 20,556.32

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Solution

The fourth proportional to 27,609.80, 38,105.04 and 20,556.32 is: 28,370.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,609.80 : 38,105.04 = 20,556.32 : x
  2. Step 2: Convert to fraction form
    27,609.80/38,105.04 = 20,556.32/x
  3. Step 3: Cross multiply
    27,609.80x = 38,105.04 × 20,556.32
  4. Step 4: Simplify right side
    27,609.80x = 783,299,395.85
  5. Step 5: Solve for x
    x = 783,299,395.85/27,609.80
  6. Step 6: Final answer
    x = 28,370.34

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Half scale
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Double scale
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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.