Home / 12,346.75-18,520.13-3,112.75

Finding the Fourth Proportional to 12,346.75, 18,520.13 and 3,112.75

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Solution

The fourth proportional to 12,346.75, 18,520.13 and 3,112.75 is: 4,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,346.75 : 18,520.13 = 3,112.75 : x
  2. Step 2: Convert to fraction form
    12,346.75/18,520.13 = 3,112.75/x
  3. Step 3: Cross multiply
    12,346.75x = 18,520.13 × 3,112.75
  4. Step 4: Simplify right side
    12,346.75x = 57,648,534.66
  5. Step 5: Solve for x
    x = 57,648,534.66/12,346.75
  6. Step 6: Final answer
    x = 4,669.13

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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.