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Finding the Fourth Proportional to 18,825.56, 28,231.64 and 13,544.64

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Solution

The fourth proportional to 18,825.56, 28,231.64 and 13,544.64 is: 20,312.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,825.56 : 28,231.64 = 13,544.64 : x
  2. Step 2: Convert to fraction form
    18,825.56/28,231.64 = 13,544.64/x
  3. Step 3: Cross multiply
    18,825.56x = 28,231.64 × 13,544.64
  4. Step 4: Simplify right side
    18,825.56x = 382,387,400.41
  5. Step 5: Solve for x
    x = 382,387,400.41/18,825.56
  6. Step 6: Final answer
    x = 20,312.14

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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.