Home / 12,425.35-17,147.96-7,121.47

Finding the Fourth Proportional to 12,425.35, 17,147.96 and 7,121.47

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Solution

The fourth proportional to 12,425.35, 17,147.96 and 7,121.47 is: 9,828.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.35 : 17,147.96 = 7,121.47 : x
  2. Step 2: Convert to fraction form
    12,425.35/17,147.96 = 7,121.47/x
  3. Step 3: Cross multiply
    12,425.35x = 17,147.96 × 7,121.47
  4. Step 4: Simplify right side
    12,425.35x = 122,118,647.09
  5. Step 5: Solve for x
    x = 122,118,647.09/12,425.35
  6. Step 6: Final answer
    x = 9,828.19

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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.