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Finding the Fourth Proportional to 19,350.40, 29,025.60 and 11,930.80

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Solution

The fourth proportional to 19,350.40, 29,025.60 and 11,930.80 is: 17,896.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,350.40 : 29,025.60 = 11,930.80 : x
  2. Step 2: Convert to fraction form
    19,350.40/29,025.60 = 11,930.80/x
  3. Step 3: Cross multiply
    19,350.40x = 29,025.60 × 11,930.80
  4. Step 4: Simplify right side
    19,350.40x = 346,298,628.48
  5. Step 5: Solve for x
    x = 346,298,628.48/19,350.40
  6. Step 6: Final answer
    x = 17,896.20

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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.