Home / 20,751.74-31,131.62-6,715.25

Finding the Fourth Proportional to 20,751.74, 31,131.62 and 6,715.25

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Solution

The fourth proportional to 20,751.74, 31,131.62 and 6,715.25 is: 10,074.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.74 : 31,131.62 = 6,715.25 : x
  2. Step 2: Convert to fraction form
    20,751.74/31,131.62 = 6,715.25/x
  3. Step 3: Cross multiply
    20,751.74x = 31,131.62 × 6,715.25
  4. Step 4: Simplify right side
    20,751.74x = 209,056,720.13
  5. Step 5: Solve for x
    x = 209,056,720.13/20,751.74
  6. Step 6: Final answer
    x = 10,074.18

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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.