Home / 21,282.44-31,872.54-11,899.40

Finding the Fourth Proportional to 21,282.44, 31,872.54 and 11,899.40

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Solution

The fourth proportional to 21,282.44, 31,872.54 and 11,899.40 is: 17,820.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.44 : 31,872.54 = 11,899.40 : x
  2. Step 2: Convert to fraction form
    21,282.44/31,872.54 = 11,899.40/x
  3. Step 3: Cross multiply
    21,282.44x = 31,872.54 × 11,899.40
  4. Step 4: Simplify right side
    21,282.44x = 379,264,102.48
  5. Step 5: Solve for x
    x = 379,264,102.48/21,282.44
  6. Step 6: Final answer
    x = 17,820.52

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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.