Home / 13,724.30-18,939.35-7,757.91

Finding the Fourth Proportional to 13,724.30, 18,939.35 and 7,757.91

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Solution

The fourth proportional to 13,724.30, 18,939.35 and 7,757.91 is: 10,705.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.30 : 18,939.35 = 7,757.91 : x
  2. Step 2: Convert to fraction form
    13,724.30/18,939.35 = 7,757.91/x
  3. Step 3: Cross multiply
    13,724.30x = 18,939.35 × 7,757.91
  4. Step 4: Simplify right side
    13,724.30x = 146,929,792.15
  5. Step 5: Solve for x
    x = 146,929,792.15/13,724.30
  6. Step 6: Final answer
    x = 10,705.81

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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.