Home / 28,820-39,787.92-18,757.28

Finding the Fourth Proportional to 28,820, 39,787.92 and 18,757.28

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Solution

The fourth proportional to 28,820, 39,787.92 and 18,757.28 is: 25,895.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,820 : 39,787.92 = 18,757.28 : x
  2. Step 2: Convert to fraction form
    28,820/39,787.92 = 18,757.28/x
  3. Step 3: Cross multiply
    28,820x = 39,787.92 × 18,757.28
  4. Step 4: Simplify right side
    28,820x = 746,313,156.06
  5. Step 5: Solve for x
    x = 746,313,156.06/28,820
  6. Step 6: Final answer
    x = 25,895.67

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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.