Home / 20,131.40-30,160.65-17,215.40

Finding the Fourth Proportional to 20,131.40, 30,160.65 and 17,215.40

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Solution

The fourth proportional to 20,131.40, 30,160.65 and 17,215.40 is: 25,791.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.40 : 30,160.65 = 17,215.40 : x
  2. Step 2: Convert to fraction form
    20,131.40/30,160.65 = 17,215.40/x
  3. Step 3: Cross multiply
    20,131.40x = 30,160.65 × 17,215.40
  4. Step 4: Simplify right side
    20,131.40x = 519,227,654.01
  5. Step 5: Solve for x
    x = 519,227,654.01/20,131.40
  6. Step 6: Final answer
    x = 25,791.93

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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.