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Finding the Fourth Proportional to 36,420.76, 50,245.02 and 20,890.12

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Solution

The fourth proportional to 36,420.76, 50,245.02 and 20,890.12 is: 28,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,420.76 : 50,245.02 = 20,890.12 : x
  2. Step 2: Convert to fraction form
    36,420.76/50,245.02 = 20,890.12/x
  3. Step 3: Cross multiply
    36,420.76x = 50,245.02 × 20,890.12
  4. Step 4: Simplify right side
    36,420.76x = 1,049,624,497.20
  5. Step 5: Solve for x
    x = 1,049,624,497.20/36,420.76
  6. Step 6: Final answer
    x = 28,819.40

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Half scale
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Double scale
Find fourth proportional to 36,421.76, 50,246.40 and 20,891.12
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.