Home / 13,638.20-18,821.24-7,669.84

Finding the Fourth Proportional to 13,638.20, 18,821.24 and 7,669.84

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Solution

The fourth proportional to 13,638.20, 18,821.24 and 7,669.84 is: 10,584.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.20 : 18,821.24 = 7,669.84 : x
  2. Step 2: Convert to fraction form
    13,638.20/18,821.24 = 7,669.84/x
  3. Step 3: Cross multiply
    13,638.20x = 18,821.24 × 7,669.84
  4. Step 4: Simplify right side
    13,638.20x = 144,355,899.40
  5. Step 5: Solve for x
    x = 144,355,899.40/13,638.20
  6. Step 6: Final answer
    x = 10,584.67

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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.