Home / 12,121.79-18,180.63-3,354.66

Finding the Fourth Proportional to 12,121.79, 18,180.63 and 3,354.66

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Solution

The fourth proportional to 12,121.79, 18,180.63 and 3,354.66 is: 5,031.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.79 : 18,180.63 = 3,354.66 : x
  2. Step 2: Convert to fraction form
    12,121.79/18,180.63 = 3,354.66/x
  3. Step 3: Cross multiply
    12,121.79x = 18,180.63 × 3,354.66
  4. Step 4: Simplify right side
    12,121.79x = 60,989,832.24
  5. Step 5: Solve for x
    x = 60,989,832.24/12,121.79
  6. Step 6: Final answer
    x = 5,031.42

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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.