Home / 21,623.45-29,842.43-13,558.39

Finding the Fourth Proportional to 21,623.45, 29,842.43 and 13,558.39

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Solution

The fourth proportional to 21,623.45, 29,842.43 and 13,558.39 is: 18,711.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.45 : 29,842.43 = 13,558.39 : x
  2. Step 2: Convert to fraction form
    21,623.45/29,842.43 = 13,558.39/x
  3. Step 3: Cross multiply
    21,623.45x = 29,842.43 × 13,558.39
  4. Step 4: Simplify right side
    21,623.45x = 404,615,162.09
  5. Step 5: Solve for x
    x = 404,615,162.09/21,623.45
  6. Step 6: Final answer
    x = 18,711.87

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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.