Home / 8,783.38-12,121.26-5,428.49

Finding the Fourth Proportional to 8,783.38, 12,121.26 and 5,428.49

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Solution

The fourth proportional to 8,783.38, 12,121.26 and 5,428.49 is: 7,491.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,783.38 : 12,121.26 = 5,428.49 : x
  2. Step 2: Convert to fraction form
    8,783.38/12,121.26 = 5,428.49/x
  3. Step 3: Cross multiply
    8,783.38x = 12,121.26 × 5,428.49
  4. Step 4: Simplify right side
    8,783.38x = 65,800,138.70
  5. Step 5: Solve for x
    x = 65,800,138.70/8,783.38
  6. Step 6: Final answer
    x = 7,491.44

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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.