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Finding the Fourth Proportional to 39,992.61, 59,976.36 and 13,691.19

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Solution

The fourth proportional to 39,992.61, 59,976.36 and 13,691.19 is: 20,532.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,992.61 : 59,976.36 = 13,691.19 : x
  2. Step 2: Convert to fraction form
    39,992.61/59,976.36 = 13,691.19/x
  3. Step 3: Cross multiply
    39,992.61x = 59,976.36 × 13,691.19
  4. Step 4: Simplify right side
    39,992.61x = 821,147,740.27
  5. Step 5: Solve for x
    x = 821,147,740.27/39,992.61
  6. Step 6: Final answer
    x = 20,532.49

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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.