Home / 20,717.31-28,589.08-12,664.45

Finding the Fourth Proportional to 20,717.31, 28,589.08 and 12,664.45

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Solution

The fourth proportional to 20,717.31, 28,589.08 and 12,664.45 is: 17,476.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.31 : 28,589.08 = 12,664.45 : x
  2. Step 2: Convert to fraction form
    20,717.31/28,589.08 = 12,664.45/x
  3. Step 3: Cross multiply
    20,717.31x = 28,589.08 × 12,664.45
  4. Step 4: Simplify right side
    20,717.31x = 362,064,918.56
  5. Step 5: Solve for x
    x = 362,064,918.56/20,717.31
  6. Step 6: Final answer
    x = 17,476.44

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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.