Home / 19,121.40-28,682.10-12,900.60

Finding the Fourth Proportional to 19,121.40, 28,682.10 and 12,900.60

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Solution

The fourth proportional to 19,121.40, 28,682.10 and 12,900.60 is: 19,350.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.40 : 28,682.10 = 12,900.60 : x
  2. Step 2: Convert to fraction form
    19,121.40/28,682.10 = 12,900.60/x
  3. Step 3: Cross multiply
    19,121.40x = 28,682.10 × 12,900.60
  4. Step 4: Simplify right side
    19,121.40x = 370,016,299.26
  5. Step 5: Solve for x
    x = 370,016,299.26/19,121.40
  6. Step 6: Final answer
    x = 19,350.90

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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.