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Finding the Fourth Proportional to 53,693.94, 80,540.97 and 20,406.18

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Solution

The fourth proportional to 53,693.94, 80,540.97 and 20,406.18 is: 30,609.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,693.94 : 80,540.97 = 20,406.18 : x
  2. Step 2: Convert to fraction form
    53,693.94/80,540.97 = 20,406.18/x
  3. Step 3: Cross multiply
    53,693.94x = 80,540.97 × 20,406.18
  4. Step 4: Simplify right side
    53,693.94x = 1,643,533,531.19
  5. Step 5: Solve for x
    x = 1,643,533,531.19/53,693.94
  6. Step 6: Final answer
    x = 30,609.29

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Similar ratio
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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.