Home / 16,815.40-25,223.10-5,128.60

Finding the Fourth Proportional to 16,815.40, 25,223.10 and 5,128.60

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Solution

The fourth proportional to 16,815.40, 25,223.10 and 5,128.60 is: 7,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,815.40 : 25,223.10 = 5,128.60 : x
  2. Step 2: Convert to fraction form
    16,815.40/25,223.10 = 5,128.60/x
  3. Step 3: Cross multiply
    16,815.40x = 25,223.10 × 5,128.60
  4. Step 4: Simplify right side
    16,815.40x = 129,359,190.66
  5. Step 5: Solve for x
    x = 129,359,190.66/16,815.40
  6. Step 6: Final answer
    x = 7,692.90

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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.