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Finding the Fourth Proportional to 18,398.97, 27,721.40 and 16,646.20

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Solution

The fourth proportional to 18,398.97, 27,721.40 and 16,646.20 is: 25,080.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.97 : 27,721.40 = 16,646.20 : x
  2. Step 2: Convert to fraction form
    18,398.97/27,721.40 = 16,646.20/x
  3. Step 3: Cross multiply
    18,398.97x = 27,721.40 × 16,646.20
  4. Step 4: Simplify right side
    18,398.97x = 461,455,816.15
  5. Step 5: Solve for x
    x = 461,455,816.15/18,398.97
  6. Step 6: Final answer
    x = 25,080.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.