Home / 20,120.60-30,180.90-18,241.40

Finding the Fourth Proportional to 20,120.60, 30,180.90 and 18,241.40

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Solution

The fourth proportional to 20,120.60, 30,180.90 and 18,241.40 is: 27,362.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.60 : 30,180.90 = 18,241.40 : x
  2. Step 2: Convert to fraction form
    20,120.60/30,180.90 = 18,241.40/x
  3. Step 3: Cross multiply
    20,120.60x = 30,180.90 × 18,241.40
  4. Step 4: Simplify right side
    20,120.60x = 550,541,869.26
  5. Step 5: Solve for x
    x = 550,541,869.26/20,120.60
  6. Step 6: Final answer
    x = 27,362.10

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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.