Home / 17,787.28-26,662-13,391.20

Finding the Fourth Proportional to 17,787.28, 26,662 and 13,391.20

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Solution

The fourth proportional to 17,787.28, 26,662 and 13,391.20 is: 20,072.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,787.28 : 26,662 = 13,391.20 : x
  2. Step 2: Convert to fraction form
    17,787.28/26,662 = 13,391.20/x
  3. Step 3: Cross multiply
    17,787.28x = 26,662 × 13,391.20
  4. Step 4: Simplify right side
    17,787.28x = 357,036,174.40
  5. Step 5: Solve for x
    x = 357,036,174.40/17,787.28
  6. Step 6: Final answer
    x = 20,072.56

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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.