Home / 13,416.75-20,128.70-4,651.65

Finding the Fourth Proportional to 13,416.75, 20,128.70 and 4,651.65

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Solution

The fourth proportional to 13,416.75, 20,128.70 and 4,651.65 is: 6,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.75 : 20,128.70 = 4,651.65 : x
  2. Step 2: Convert to fraction form
    13,416.75/20,128.70 = 4,651.65/x
  3. Step 3: Cross multiply
    13,416.75x = 20,128.70 × 4,651.65
  4. Step 4: Simplify right side
    13,416.75x = 93,631,644.10
  5. Step 5: Solve for x
    x = 93,631,644.10/13,416.75
  6. Step 6: Final answer
    x = 6,978.71

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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.