Home / 13,757.12-18,981.66-7,787.49

Finding the Fourth Proportional to 13,757.12, 18,981.66 and 7,787.49

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Solution

The fourth proportional to 13,757.12, 18,981.66 and 7,787.49 is: 10,744.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.12 : 18,981.66 = 7,787.49 : x
  2. Step 2: Convert to fraction form
    13,757.12/18,981.66 = 7,787.49/x
  3. Step 3: Cross multiply
    13,757.12x = 18,981.66 × 7,787.49
  4. Step 4: Simplify right side
    13,757.12x = 147,819,487.43
  5. Step 5: Solve for x
    x = 147,819,487.43/13,757.12
  6. Step 6: Final answer
    x = 10,744.94

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1.5x scale

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.