Home / 7,922.40-11,869.20-6,453.60

Finding the Fourth Proportional to 7,922.40, 11,869.20 and 6,453.60

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Solution

The fourth proportional to 7,922.40, 11,869.20 and 6,453.60 is: 9,668.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,922.40 : 11,869.20 = 6,453.60 : x
  2. Step 2: Convert to fraction form
    7,922.40/11,869.20 = 6,453.60/x
  3. Step 3: Cross multiply
    7,922.40x = 11,869.20 × 6,453.60
  4. Step 4: Simplify right side
    7,922.40x = 76,599,069.12
  5. Step 5: Solve for x
    x = 76,599,069.12/7,922.40
  6. Step 6: Final answer
    x = 9,668.67

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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.