Home / 18,938-28,401.56-5,787.28

Finding the Fourth Proportional to 18,938, 28,401.56 and 5,787.28

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Solution

The fourth proportional to 18,938, 28,401.56 and 5,787.28 is: 8,679.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938 : 28,401.56 = 5,787.28 : x
  2. Step 2: Convert to fraction form
    18,938/28,401.56 = 5,787.28/x
  3. Step 3: Cross multiply
    18,938x = 28,401.56 × 5,787.28
  4. Step 4: Simplify right side
    18,938x = 164,367,780.16
  5. Step 5: Solve for x
    x = 164,367,780.16/18,938
  6. Step 6: Final answer
    x = 8,679.26

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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.