Home / 21,236.84-29,306.12-11,805.20

Finding the Fourth Proportional to 21,236.84, 29,306.12 and 11,805.20

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Solution

The fourth proportional to 21,236.84, 29,306.12 and 11,805.20 is: 16,290.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.84 : 29,306.12 = 11,805.20 : x
  2. Step 2: Convert to fraction form
    21,236.84/29,306.12 = 11,805.20/x
  3. Step 3: Cross multiply
    21,236.84x = 29,306.12 × 11,805.20
  4. Step 4: Simplify right side
    21,236.84x = 345,964,607.82
  5. Step 5: Solve for x
    x = 345,964,607.82/21,236.84
  6. Step 6: Final answer
    x = 16,290.78

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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.