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Finding the Fourth Proportional to 39,992.16, 59,996.60 and 11,912.16

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Solution

The fourth proportional to 39,992.16, 59,996.60 and 11,912.16 is: 17,870.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,992.16 : 59,996.60 = 11,912.16 : x
  2. Step 2: Convert to fraction form
    39,992.16/59,996.60 = 11,912.16/x
  3. Step 3: Cross multiply
    39,992.16x = 59,996.60 × 11,912.16
  4. Step 4: Simplify right side
    39,992.16x = 714,689,098.66
  5. Step 5: Solve for x
    x = 714,689,098.66/39,992.16
  6. Step 6: Final answer
    x = 17,870.73

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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.