Home / 12,450.78-18,672.30-4,128.93

Finding the Fourth Proportional to 12,450.78, 18,672.30 and 4,128.93

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Solution

The fourth proportional to 12,450.78, 18,672.30 and 4,128.93 is: 6,192.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,450.78 : 18,672.30 = 4,128.93 : x
  2. Step 2: Convert to fraction form
    12,450.78/18,672.30 = 4,128.93/x
  3. Step 3: Cross multiply
    12,450.78x = 18,672.30 × 4,128.93
  4. Step 4: Simplify right side
    12,450.78x = 77,096,619.64
  5. Step 5: Solve for x
    x = 77,096,619.64/12,450.78
  6. Step 6: Final answer
    x = 6,192.11

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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.