Home / 12,142.40-18,202.80-4,745.18

Finding the Fourth Proportional to 12,142.40, 18,202.80 and 4,745.18

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Solution

The fourth proportional to 12,142.40, 18,202.80 and 4,745.18 is: 7,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.40 : 18,202.80 = 4,745.18 : x
  2. Step 2: Convert to fraction form
    12,142.40/18,202.80 = 4,745.18/x
  3. Step 3: Cross multiply
    12,142.40x = 18,202.80 × 4,745.18
  4. Step 4: Simplify right side
    12,142.40x = 86,375,562.50
  5. Step 5: Solve for x
    x = 86,375,562.50/12,142.40
  6. Step 6: Final answer
    x = 7,113.55

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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.