Home / 12,131.20-18,196.80-4,735.90

Finding the Fourth Proportional to 12,131.20, 18,196.80 and 4,735.90

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Solution

The fourth proportional to 12,131.20, 18,196.80 and 4,735.90 is: 7,103.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,131.20 : 18,196.80 = 4,735.90 : x
  2. Step 2: Convert to fraction form
    12,131.20/18,196.80 = 4,735.90/x
  3. Step 3: Cross multiply
    12,131.20x = 18,196.80 × 4,735.90
  4. Step 4: Simplify right side
    12,131.20x = 86,178,225.12
  5. Step 5: Solve for x
    x = 86,178,225.12/12,131.20
  6. Step 6: Final answer
    x = 7,103.85

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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.