Home / 20,577.28-28,396.62-11,145.88

Finding the Fourth Proportional to 20,577.28, 28,396.62 and 11,145.88

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Solution

The fourth proportional to 20,577.28, 28,396.62 and 11,145.88 is: 15,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.28 : 28,396.62 = 11,145.88 : x
  2. Step 2: Convert to fraction form
    20,577.28/28,396.62 = 11,145.88/x
  3. Step 3: Cross multiply
    20,577.28x = 28,396.62 × 11,145.88
  4. Step 4: Simplify right side
    20,577.28x = 316,505,318.93
  5. Step 5: Solve for x
    x = 316,505,318.93/20,577.28
  6. Step 6: Final answer
    x = 15,381.30

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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.