Home / 7,115.67-9,815.54-4,131.12

Finding the Fourth Proportional to 7,115.67, 9,815.54 and 4,131.12

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Solution

The fourth proportional to 7,115.67, 9,815.54 and 4,131.12 is: 5,698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.67 : 9,815.54 = 4,131.12 : x
  2. Step 2: Convert to fraction form
    7,115.67/9,815.54 = 4,131.12/x
  3. Step 3: Cross multiply
    7,115.67x = 9,815.54 × 4,131.12
  4. Step 4: Simplify right side
    7,115.67x = 40,549,173.60
  5. Step 5: Solve for x
    x = 40,549,173.60/7,115.67
  6. Step 6: Final answer
    x = 5,698.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.