Home / 20,119.12-30,178.68-8,272.84

Finding the Fourth Proportional to 20,119.12, 30,178.68 and 8,272.84

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Solution

The fourth proportional to 20,119.12, 30,178.68 and 8,272.84 is: 12,409.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,119.12 : 30,178.68 = 8,272.84 : x
  2. Step 2: Convert to fraction form
    20,119.12/30,178.68 = 8,272.84/x
  3. Step 3: Cross multiply
    20,119.12x = 30,178.68 × 8,272.84
  4. Step 4: Simplify right side
    20,119.12x = 249,663,391.05
  5. Step 5: Solve for x
    x = 249,663,391.05/20,119.12
  6. Step 6: Final answer
    x = 12,409.26

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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.