Home / 21,335.30-31,956.78-15,479

Finding the Fourth Proportional to 21,335.30, 31,956.78 and 15,479

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Solution

The fourth proportional to 21,335.30, 31,956.78 and 15,479 is: 23,185.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.30 : 31,956.78 = 15,479 : x
  2. Step 2: Convert to fraction form
    21,335.30/31,956.78 = 15,479/x
  3. Step 3: Cross multiply
    21,335.30x = 31,956.78 × 15,479
  4. Step 4: Simplify right side
    21,335.30x = 494,658,997.62
  5. Step 5: Solve for x
    x = 494,658,997.62/21,335.30
  6. Step 6: Final answer
    x = 23,185.00

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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.