Home / 20,861.44-31,289.28-7,008.64

Finding the Fourth Proportional to 20,861.44, 31,289.28 and 7,008.64

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Solution

The fourth proportional to 20,861.44, 31,289.28 and 7,008.64 is: 10,511.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.44 : 31,289.28 = 7,008.64 : x
  2. Step 2: Convert to fraction form
    20,861.44/31,289.28 = 7,008.64/x
  3. Step 3: Cross multiply
    20,861.44x = 31,289.28 × 7,008.64
  4. Step 4: Simplify right side
    20,861.44x = 219,295,299.38
  5. Step 5: Solve for x
    x = 219,295,299.38/20,861.44
  6. Step 6: Final answer
    x = 10,511.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.