Home / 21,160.56-31,744.48-8,687.36

Finding the Fourth Proportional to 21,160.56, 31,744.48 and 8,687.36

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Solution

The fourth proportional to 21,160.56, 31,744.48 and 8,687.36 is: 13,032.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.56 : 31,744.48 = 8,687.36 : x
  2. Step 2: Convert to fraction form
    21,160.56/31,744.48 = 8,687.36/x
  3. Step 3: Cross multiply
    21,160.56x = 31,744.48 × 8,687.36
  4. Step 4: Simplify right side
    21,160.56x = 275,775,725.77
  5. Step 5: Solve for x
    x = 275,775,725.77/21,160.56
  6. Step 6: Final answer
    x = 13,032.53

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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.