Home / 5,428.72-8,143.68-1,729.65

Finding the Fourth Proportional to 5,428.72, 8,143.68 and 1,729.65

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Solution

The fourth proportional to 5,428.72, 8,143.68 and 1,729.65 is: 2,594.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.72 : 8,143.68 = 1,729.65 : x
  2. Step 2: Convert to fraction form
    5,428.72/8,143.68 = 1,729.65/x
  3. Step 3: Cross multiply
    5,428.72x = 8,143.68 × 1,729.65
  4. Step 4: Simplify right side
    5,428.72x = 14,085,716.11
  5. Step 5: Solve for x
    x = 14,085,716.11/5,428.72
  6. Step 6: Final answer
    x = 2,594.67

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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.