Home / 20,181.10-30,271.65-12,394.30

Finding the Fourth Proportional to 20,181.10, 30,271.65 and 12,394.30

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Solution

The fourth proportional to 20,181.10, 30,271.65 and 12,394.30 is: 18,591.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,181.10 : 30,271.65 = 12,394.30 : x
  2. Step 2: Convert to fraction form
    20,181.10/30,271.65 = 12,394.30/x
  3. Step 3: Cross multiply
    20,181.10x = 30,271.65 × 12,394.30
  4. Step 4: Simplify right side
    20,181.10x = 375,195,911.60
  5. Step 5: Solve for x
    x = 375,195,911.60/20,181.10
  6. Step 6: Final answer
    x = 18,591.45

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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.