Home / 20,787.53-31,151.07-11,875.37

Finding the Fourth Proportional to 20,787.53, 31,151.07 and 11,875.37

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Solution

The fourth proportional to 20,787.53, 31,151.07 and 11,875.37 is: 17,795.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.53 : 31,151.07 = 11,875.37 : x
  2. Step 2: Convert to fraction form
    20,787.53/31,151.07 = 11,875.37/x
  3. Step 3: Cross multiply
    20,787.53x = 31,151.07 × 11,875.37
  4. Step 4: Simplify right side
    20,787.53x = 369,930,326.39
  5. Step 5: Solve for x
    x = 369,930,326.39/20,787.53
  6. Step 6: Final answer
    x = 17,795.79

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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.