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Finding the Fourth Proportional to 39,930.40, 59,884.80 and 11,850.40

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Solution

The fourth proportional to 39,930.40, 59,884.80 and 11,850.40 is: 17,772.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,930.40 : 59,884.80 = 11,850.40 : x
  2. Step 2: Convert to fraction form
    39,930.40/59,884.80 = 11,850.40/x
  3. Step 3: Cross multiply
    39,930.40x = 59,884.80 × 11,850.40
  4. Step 4: Simplify right side
    39,930.40x = 709,658,833.92
  5. Step 5: Solve for x
    x = 709,658,833.92/39,930.40
  6. Step 6: Final answer
    x = 17,772.39

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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.