Home / 12,405.35-17,120.86-7,101.88

Finding the Fourth Proportional to 12,405.35, 17,120.86 and 7,101.88

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Solution

The fourth proportional to 12,405.35, 17,120.86 and 7,101.88 is: 9,801.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.35 : 17,120.86 = 7,101.88 : x
  2. Step 2: Convert to fraction form
    12,405.35/17,120.86 = 7,101.88/x
  3. Step 3: Cross multiply
    12,405.35x = 17,120.86 × 7,101.88
  4. Step 4: Simplify right side
    12,405.35x = 121,590,232.66
  5. Step 5: Solve for x
    x = 121,590,232.66/12,405.35
  6. Step 6: Final answer
    x = 9,801.43

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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.