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Finding the Fourth Proportional to 40,967.52, 61,487.91 and 20,990.64

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Solution

The fourth proportional to 40,967.52, 61,487.91 and 20,990.64 is: 31,504.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,967.52 : 61,487.91 = 20,990.64 : x
  2. Step 2: Convert to fraction form
    40,967.52/61,487.91 = 20,990.64/x
  3. Step 3: Cross multiply
    40,967.52x = 61,487.91 × 20,990.64
  4. Step 4: Simplify right side
    40,967.52x = 1,290,670,583.16
  5. Step 5: Solve for x
    x = 1,290,670,583.16/40,967.52
  6. Step 6: Final answer
    x = 31,504.73

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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.