Home / 20,214.40-30,321.60-18,100.30

Finding the Fourth Proportional to 20,214.40, 30,321.60 and 18,100.30

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Solution

The fourth proportional to 20,214.40, 30,321.60 and 18,100.30 is: 27,150.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,214.40 : 30,321.60 = 18,100.30 : x
  2. Step 2: Convert to fraction form
    20,214.40/30,321.60 = 18,100.30/x
  3. Step 3: Cross multiply
    20,214.40x = 30,321.60 × 18,100.30
  4. Step 4: Simplify right side
    20,214.40x = 548,830,056.48
  5. Step 5: Solve for x
    x = 548,830,056.48/20,214.40
  6. Step 6: Final answer
    x = 27,150.45

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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.