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Finding the Fourth Proportional to 21,173.80, 29,134.02 and 17,383

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Solution

The fourth proportional to 21,173.80, 29,134.02 and 17,383 is: 23,918.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.80 : 29,134.02 = 17,383 : x
  2. Step 2: Convert to fraction form
    21,173.80/29,134.02 = 17,383/x
  3. Step 3: Cross multiply
    21,173.80x = 29,134.02 × 17,383
  4. Step 4: Simplify right side
    21,173.80x = 506,436,669.66
  5. Step 5: Solve for x
    x = 506,436,669.66/21,173.80
  6. Step 6: Final answer
    x = 23,918.08

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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.