Home / 12,122.40-18,179.88-3,355.20

Finding the Fourth Proportional to 12,122.40, 18,179.88 and 3,355.20

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Solution

The fourth proportional to 12,122.40, 18,179.88 and 3,355.20 is: 5,031.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.40 : 18,179.88 = 3,355.20 : x
  2. Step 2: Convert to fraction form
    12,122.40/18,179.88 = 3,355.20/x
  3. Step 3: Cross multiply
    12,122.40x = 18,179.88 × 3,355.20
  4. Step 4: Simplify right side
    12,122.40x = 60,997,133.38
  5. Step 5: Solve for x
    x = 60,997,133.38/12,122.40
  6. Step 6: Final answer
    x = 5,031.77

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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.