Home / 18,921.91-26,083.71-15,558.89

Finding the Fourth Proportional to 18,921.91, 26,083.71 and 15,558.89

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Solution

The fourth proportional to 18,921.91, 26,083.71 and 15,558.89 is: 21,447.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.91 : 26,083.71 = 15,558.89 : x
  2. Step 2: Convert to fraction form
    18,921.91/26,083.71 = 15,558.89/x
  3. Step 3: Cross multiply
    18,921.91x = 26,083.71 × 15,558.89
  4. Step 4: Simplify right side
    18,921.91x = 405,833,574.68
  5. Step 5: Solve for x
    x = 405,833,574.68/18,921.91
  6. Step 6: Final answer
    x = 21,447.81

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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.