Home / 21,309.73-29,395.39-13,338.12

Finding the Fourth Proportional to 21,309.73, 29,395.39 and 13,338.12

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Solution

The fourth proportional to 21,309.73, 29,395.39 and 13,338.12 is: 18,399.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.73 : 29,395.39 = 13,338.12 : x
  2. Step 2: Convert to fraction form
    21,309.73/29,395.39 = 13,338.12/x
  3. Step 3: Cross multiply
    21,309.73x = 29,395.39 × 13,338.12
  4. Step 4: Simplify right side
    21,309.73x = 392,079,025.60
  5. Step 5: Solve for x
    x = 392,079,025.60/21,309.73
  6. Step 6: Final answer
    x = 18,399.06

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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.