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Finding the Fourth Proportional to 16,815.33, 25,223.00 and 5,128.45

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Solution

The fourth proportional to 16,815.33, 25,223.00 and 5,128.45 is: 7,692.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,815.33 : 25,223.00 = 5,128.45 : x
  2. Step 2: Convert to fraction form
    16,815.33/25,223.00 = 5,128.45/x
  3. Step 3: Cross multiply
    16,815.33x = 25,223.00 × 5,128.45
  4. Step 4: Simplify right side
    16,815.33x = 129,354,805.65
  5. Step 5: Solve for x
    x = 129,354,805.65/16,815.33
  6. Step 6: Final answer
    x = 7,692.67

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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.