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Finding the Fourth Proportional to 39,940.76, 59,905.92 and 11,860.24

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Solution

The fourth proportional to 39,940.76, 59,905.92 and 11,860.24 is: 17,788.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,940.76 : 59,905.92 = 11,860.24 : x
  2. Step 2: Convert to fraction form
    39,940.76/59,905.92 = 11,860.24/x
  3. Step 3: Cross multiply
    39,940.76x = 59,905.92 × 11,860.24
  4. Step 4: Simplify right side
    39,940.76x = 710,498,588.62
  5. Step 5: Solve for x
    x = 710,498,588.62/39,940.76
  6. Step 6: Final answer
    x = 17,788.81

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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.