Home / 20,853.55-28,747.81-13,767.67

Finding the Fourth Proportional to 20,853.55, 28,747.81 and 13,767.67

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Solution

The fourth proportional to 20,853.55, 28,747.81 and 13,767.67 is: 18,979.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.55 : 28,747.81 = 13,767.67 : x
  2. Step 2: Convert to fraction form
    20,853.55/28,747.81 = 13,767.67/x
  3. Step 3: Cross multiply
    20,853.55x = 28,747.81 × 13,767.67
  4. Step 4: Simplify right side
    20,853.55x = 395,790,414.45
  5. Step 5: Solve for x
    x = 395,790,414.45/20,853.55
  6. Step 6: Final answer
    x = 18,979.52

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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.