Home / 10,720.53-16,085.12-4,879.89

Finding the Fourth Proportional to 10,720.53, 16,085.12 and 4,879.89

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Solution

The fourth proportional to 10,720.53, 16,085.12 and 4,879.89 is: 7,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,720.53 : 16,085.12 = 4,879.89 : x
  2. Step 2: Convert to fraction form
    10,720.53/16,085.12 = 4,879.89/x
  3. Step 3: Cross multiply
    10,720.53x = 16,085.12 × 4,879.89
  4. Step 4: Simplify right side
    10,720.53x = 78,493,591.84
  5. Step 5: Solve for x
    x = 78,493,591.84/10,720.53
  6. Step 6: Final answer
    x = 7,321.80

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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.