Home / 20,102.80-27,763.56-15,679.12

Finding the Fourth Proportional to 20,102.80, 27,763.56 and 15,679.12

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Solution

The fourth proportional to 20,102.80, 27,763.56 and 15,679.12 is: 21,654.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.80 : 27,763.56 = 15,679.12 : x
  2. Step 2: Convert to fraction form
    20,102.80/27,763.56 = 15,679.12/x
  3. Step 3: Cross multiply
    20,102.80x = 27,763.56 × 15,679.12
  4. Step 4: Simplify right side
    20,102.80x = 435,308,188.87
  5. Step 5: Solve for x
    x = 435,308,188.87/20,102.80
  6. Step 6: Final answer
    x = 21,654.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.