Home / 9,115.88-13,668.60-5,420.69

Finding the Fourth Proportional to 9,115.88, 13,668.60 and 5,420.69

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Solution

The fourth proportional to 9,115.88, 13,668.60 and 5,420.69 is: 8,127.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.88 : 13,668.60 = 5,420.69 : x
  2. Step 2: Convert to fraction form
    9,115.88/13,668.60 = 5,420.69/x
  3. Step 3: Cross multiply
    9,115.88x = 13,668.60 × 5,420.69
  4. Step 4: Simplify right side
    9,115.88x = 74,093,243.33
  5. Step 5: Solve for x
    x = 74,093,243.33/9,115.88
  6. Step 6: Final answer
    x = 8,127.93

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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.