Home / 20,212.20-30,318.30-15,291.45

Finding the Fourth Proportional to 20,212.20, 30,318.30 and 15,291.45

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Solution

The fourth proportional to 20,212.20, 30,318.30 and 15,291.45 is: 22,937.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.20 : 30,318.30 = 15,291.45 : x
  2. Step 2: Convert to fraction form
    20,212.20/30,318.30 = 15,291.45/x
  3. Step 3: Cross multiply
    20,212.20x = 30,318.30 × 15,291.45
  4. Step 4: Simplify right side
    20,212.20x = 463,610,768.54
  5. Step 5: Solve for x
    x = 463,610,768.54/20,212.20
  6. Step 6: Final answer
    x = 22,937.18

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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.