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Finding the Fourth Proportional to 35,992.78, 53,990.13 and 12,620.62

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Solution

The fourth proportional to 35,992.78, 53,990.13 and 12,620.62 is: 18,931.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,992.78 : 53,990.13 = 12,620.62 : x
  2. Step 2: Convert to fraction form
    35,992.78/53,990.13 = 12,620.62/x
  3. Step 3: Cross multiply
    35,992.78x = 53,990.13 × 12,620.62
  4. Step 4: Simplify right side
    35,992.78x = 681,388,914.48
  5. Step 5: Solve for x
    x = 681,388,914.48/35,992.78
  6. Step 6: Final answer
    x = 18,931.27

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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.