Home / 12,129.73-18,190.05-4,230.23

Finding the Fourth Proportional to 12,129.73, 18,190.05 and 4,230.23

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Solution

The fourth proportional to 12,129.73, 18,190.05 and 4,230.23 is: 6,343.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.73 : 18,190.05 = 4,230.23 : x
  2. Step 2: Convert to fraction form
    12,129.73/18,190.05 = 4,230.23/x
  3. Step 3: Cross multiply
    12,129.73x = 18,190.05 × 4,230.23
  4. Step 4: Simplify right side
    12,129.73x = 76,948,012.19
  5. Step 5: Solve for x
    x = 76,948,012.19/12,129.73
  6. Step 6: Final answer
    x = 6,343.75

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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.