Home / 13,722.44-18,935.64-10,139.60

Finding the Fourth Proportional to 13,722.44, 18,935.64 and 10,139.60

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Solution

The fourth proportional to 13,722.44, 18,935.64 and 10,139.60 is: 13,991.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.44 : 18,935.64 = 10,139.60 : x
  2. Step 2: Convert to fraction form
    13,722.44/18,935.64 = 10,139.60/x
  3. Step 3: Cross multiply
    13,722.44x = 18,935.64 × 10,139.60
  4. Step 4: Simplify right side
    13,722.44x = 191,999,862.68
  5. Step 5: Solve for x
    x = 191,999,862.68/13,722.44
  6. Step 6: Final answer
    x = 13,991.68

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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.