Home / 13,855.12-20,769.72-5,087.68

Finding the Fourth Proportional to 13,855.12, 20,769.72 and 5,087.68

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Solution

The fourth proportional to 13,855.12, 20,769.72 and 5,087.68 is: 7,626.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.12 : 20,769.72 = 5,087.68 : x
  2. Step 2: Convert to fraction form
    13,855.12/20,769.72 = 5,087.68/x
  3. Step 3: Cross multiply
    13,855.12x = 20,769.72 × 5,087.68
  4. Step 4: Simplify right side
    13,855.12x = 105,669,689.05
  5. Step 5: Solve for x
    x = 105,669,689.05/13,855.12
  6. Step 6: Final answer
    x = 7,626.76

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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.