Home / 20,218.40-30,349.17-17,893.20

Finding the Fourth Proportional to 20,218.40, 30,349.17 and 17,893.20

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Solution

The fourth proportional to 20,218.40, 30,349.17 and 17,893.20 is: 26,858.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.40 : 30,349.17 = 17,893.20 : x
  2. Step 2: Convert to fraction form
    20,218.40/30,349.17 = 17,893.20/x
  3. Step 3: Cross multiply
    20,218.40x = 30,349.17 × 17,893.20
  4. Step 4: Simplify right side
    20,218.40x = 543,043,768.64
  5. Step 5: Solve for x
    x = 543,043,768.64/20,218.40
  6. Step 6: Final answer
    x = 26,858.89

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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.