Home / 12,112.40-18,170.76-3,347.12

Finding the Fourth Proportional to 12,112.40, 18,170.76 and 3,347.12

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Solution

The fourth proportional to 12,112.40, 18,170.76 and 3,347.12 is: 5,021.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.40 : 18,170.76 = 3,347.12 : x
  2. Step 2: Convert to fraction form
    12,112.40/18,170.76 = 3,347.12/x
  3. Step 3: Cross multiply
    12,112.40x = 18,170.76 × 3,347.12
  4. Step 4: Simplify right side
    12,112.40x = 60,819,714.21
  5. Step 5: Solve for x
    x = 60,819,714.21/12,112.40
  6. Step 6: Final answer
    x = 5,021.28

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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.