Home / 10,128.18-15,192.20-5,450.39

Finding the Fourth Proportional to 10,128.18, 15,192.20 and 5,450.39

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Solution

The fourth proportional to 10,128.18, 15,192.20 and 5,450.39 is: 8,175.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.18 : 15,192.20 = 5,450.39 : x
  2. Step 2: Convert to fraction form
    10,128.18/15,192.20 = 5,450.39/x
  3. Step 3: Cross multiply
    10,128.18x = 15,192.20 × 5,450.39
  4. Step 4: Simplify right side
    10,128.18x = 82,803,311.75
  5. Step 5: Solve for x
    x = 82,803,311.75/10,128.18
  6. Step 6: Final answer
    x = 8,175.54

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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.