Home / 39,715.25-54,806.90-21,811.41

Finding the Fourth Proportional to 39,715.25, 54,806.90 and 21,811.41

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Solution

The fourth proportional to 39,715.25, 54,806.90 and 21,811.41 is: 30,099.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,715.25 : 54,806.90 = 21,811.41 : x
  2. Step 2: Convert to fraction form
    39,715.25/54,806.90 = 21,811.41/x
  3. Step 3: Cross multiply
    39,715.25x = 54,806.90 × 21,811.41
  4. Step 4: Simplify right side
    39,715.25x = 1,195,415,657.67
  5. Step 5: Solve for x
    x = 1,195,415,657.67/39,715.25
  6. Step 6: Final answer
    x = 30,099.67

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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.