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Finding the Fourth Proportional to 18,515.88, 27,709.22 and 15,145.16

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Solution

The fourth proportional to 18,515.88, 27,709.22 and 15,145.16 is: 22,664.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.88 : 27,709.22 = 15,145.16 : x
  2. Step 2: Convert to fraction form
    18,515.88/27,709.22 = 15,145.16/x
  3. Step 3: Cross multiply
    18,515.88x = 27,709.22 × 15,145.16
  4. Step 4: Simplify right side
    18,515.88x = 419,660,356.10
  5. Step 5: Solve for x
    x = 419,660,356.10/18,515.88
  6. Step 6: Final answer
    x = 22,664.89

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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.