Home / 12,120.30-18,180.45-3,354.48

Finding the Fourth Proportional to 12,120.30, 18,180.45 and 3,354.48

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Solution

The fourth proportional to 12,120.30, 18,180.45 and 3,354.48 is: 5,031.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.30 : 18,180.45 = 3,354.48 : x
  2. Step 2: Convert to fraction form
    12,120.30/18,180.45 = 3,354.48/x
  3. Step 3: Cross multiply
    12,120.30x = 18,180.45 × 3,354.48
  4. Step 4: Simplify right side
    12,120.30x = 60,985,955.92
  5. Step 5: Solve for x
    x = 60,985,955.92/12,120.30
  6. Step 6: Final answer
    x = 5,031.72

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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.