Home / 13,722.12-18,939.64-7,757.24

Finding the Fourth Proportional to 13,722.12, 18,939.64 and 7,757.24

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Solution

The fourth proportional to 13,722.12, 18,939.64 and 7,757.24 is: 10,706.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.12 : 18,939.64 = 7,757.24 : x
  2. Step 2: Convert to fraction form
    13,722.12/18,939.64 = 7,757.24/x
  3. Step 3: Cross multiply
    13,722.12x = 18,939.64 × 7,757.24
  4. Step 4: Simplify right side
    13,722.12x = 146,919,332.99
  5. Step 5: Solve for x
    x = 146,919,332.99/13,722.12
  6. Step 6: Final answer
    x = 10,706.75

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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.