Home / 20,140.55-30,215.61-19,805.88

Finding the Fourth Proportional to 20,140.55, 30,215.61 and 19,805.88

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Solution

The fourth proportional to 20,140.55, 30,215.61 and 19,805.88 is: 29,713.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.55 : 30,215.61 = 19,805.88 : x
  2. Step 2: Convert to fraction form
    20,140.55/30,215.61 = 19,805.88/x
  3. Step 3: Cross multiply
    20,140.55x = 30,215.61 × 19,805.88
  4. Step 4: Simplify right side
    20,140.55x = 598,446,745.79
  5. Step 5: Solve for x
    x = 598,446,745.79/20,140.55
  6. Step 6: Final answer
    x = 29,713.53

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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.