Home / 20,109.61-30,164.42-13,778.24

Finding the Fourth Proportional to 20,109.61, 30,164.42 and 13,778.24

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Solution

The fourth proportional to 20,109.61, 30,164.42 and 13,778.24 is: 20,667.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.61 : 30,164.42 = 13,778.24 : x
  2. Step 2: Convert to fraction form
    20,109.61/30,164.42 = 13,778.24/x
  3. Step 3: Cross multiply
    20,109.61x = 30,164.42 × 13,778.24
  4. Step 4: Simplify right side
    20,109.61x = 415,612,618.22
  5. Step 5: Solve for x
    x = 415,612,618.22/20,109.61
  6. Step 6: Final answer
    x = 20,667.36

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Double scale
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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.