Home / 13,722.05-18,936.51-7,434.43

Finding the Fourth Proportional to 13,722.05, 18,936.51 and 7,434.43

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Solution

The fourth proportional to 13,722.05, 18,936.51 and 7,434.43 is: 10,259.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.05 : 18,936.51 = 7,434.43 : x
  2. Step 2: Convert to fraction form
    13,722.05/18,936.51 = 7,434.43/x
  3. Step 3: Cross multiply
    13,722.05x = 18,936.51 × 7,434.43
  4. Step 4: Simplify right side
    13,722.05x = 140,782,110.70
  5. Step 5: Solve for x
    x = 140,782,110.70/13,722.05
  6. Step 6: Final answer
    x = 10,259.55

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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.