Home / 20,221.85-30,174.59-18,120.44

Finding the Fourth Proportional to 20,221.85, 30,174.59 and 18,120.44

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Solution

The fourth proportional to 20,221.85, 30,174.59 and 18,120.44 is: 27,038.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.85 : 30,174.59 = 18,120.44 : x
  2. Step 2: Convert to fraction form
    20,221.85/30,174.59 = 18,120.44/x
  3. Step 3: Cross multiply
    20,221.85x = 30,174.59 × 18,120.44
  4. Step 4: Simplify right side
    20,221.85x = 546,776,968.36
  5. Step 5: Solve for x
    x = 546,776,968.36/20,221.85
  6. Step 6: Final answer
    x = 27,038.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.