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Finding the Fourth Proportional to 18,467.20, 27,643.20 and 17,891.20

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Solution

The fourth proportional to 18,467.20, 27,643.20 and 17,891.20 is: 26,781.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,467.20 : 27,643.20 = 17,891.20 : x
  2. Step 2: Convert to fraction form
    18,467.20/27,643.20 = 17,891.20/x
  3. Step 3: Cross multiply
    18,467.20x = 27,643.20 × 17,891.20
  4. Step 4: Simplify right side
    18,467.20x = 494,570,019.84
  5. Step 5: Solve for x
    x = 494,570,019.84/18,467.20
  6. Step 6: Final answer
    x = 26,781.00

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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.