Home / 12,438.03-17,186.33-9,940.75

Finding the Fourth Proportional to 12,438.03, 17,186.33 and 9,940.75

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Solution

The fourth proportional to 12,438.03, 17,186.33 and 9,940.75 is: 13,735.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.03 : 17,186.33 = 9,940.75 : x
  2. Step 2: Convert to fraction form
    12,438.03/17,186.33 = 9,940.75/x
  3. Step 3: Cross multiply
    12,438.03x = 17,186.33 × 9,940.75
  4. Step 4: Simplify right side
    12,438.03x = 170,845,009.95
  5. Step 5: Solve for x
    x = 170,845,009.95/12,438.03
  6. Step 6: Final answer
    x = 13,735.70

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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.