Home / 20,289.69-27,999.68-11,336.76

Finding the Fourth Proportional to 20,289.69, 27,999.68 and 11,336.76

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Solution

The fourth proportional to 20,289.69, 27,999.68 and 11,336.76 is: 15,644.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.69 : 27,999.68 = 11,336.76 : x
  2. Step 2: Convert to fraction form
    20,289.69/27,999.68 = 11,336.76/x
  3. Step 3: Cross multiply
    20,289.69x = 27,999.68 × 11,336.76
  4. Step 4: Simplify right side
    20,289.69x = 317,425,595.55
  5. Step 5: Solve for x
    x = 317,425,595.55/20,289.69
  6. Step 6: Final answer
    x = 15,644.67

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Half scale
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Double scale
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Similar ratio
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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.