Home / 21,731.16-29,993.56-13,236.06

Finding the Fourth Proportional to 21,731.16, 29,993.56 and 13,236.06

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Solution

The fourth proportional to 21,731.16, 29,993.56 and 13,236.06 is: 18,268.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.16 : 29,993.56 = 13,236.06 : x
  2. Step 2: Convert to fraction form
    21,731.16/29,993.56 = 13,236.06/x
  3. Step 3: Cross multiply
    21,731.16x = 29,993.56 × 13,236.06
  4. Step 4: Simplify right side
    21,731.16x = 396,996,559.77
  5. Step 5: Solve for x
    x = 396,996,559.77/21,731.16
  6. Step 6: Final answer
    x = 18,268.54

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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.