Home / 21,956.06-30,299.40-12,398

Finding the Fourth Proportional to 21,956.06, 30,299.40 and 12,398

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Solution

The fourth proportional to 21,956.06, 30,299.40 and 12,398 is: 17,109.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.06 : 30,299.40 = 12,398 : x
  2. Step 2: Convert to fraction form
    21,956.06/30,299.40 = 12,398/x
  3. Step 3: Cross multiply
    21,956.06x = 30,299.40 × 12,398
  4. Step 4: Simplify right side
    21,956.06x = 375,651,961.20
  5. Step 5: Solve for x
    x = 375,651,961.20/21,956.06
  6. Step 6: Final answer
    x = 17,109.26

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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.