Home / 12,122.40-18,189.12-5,879.04

Finding the Fourth Proportional to 12,122.40, 18,189.12 and 5,879.04

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Solution

The fourth proportional to 12,122.40, 18,189.12 and 5,879.04 is: 8,821.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.40 : 18,189.12 = 5,879.04 : x
  2. Step 2: Convert to fraction form
    12,122.40/18,189.12 = 5,879.04/x
  3. Step 3: Cross multiply
    12,122.40x = 18,189.12 × 5,879.04
  4. Step 4: Simplify right side
    12,122.40x = 106,934,564.04
  5. Step 5: Solve for x
    x = 106,934,564.04/12,122.40
  6. Step 6: Final answer
    x = 8,821.24

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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.