Home / 21,899.81-30,223.97-13,407.54

Finding the Fourth Proportional to 21,899.81, 30,223.97 and 13,407.54

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Solution

The fourth proportional to 21,899.81, 30,223.97 and 13,407.54 is: 18,503.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.81 : 30,223.97 = 13,407.54 : x
  2. Step 2: Convert to fraction form
    21,899.81/30,223.97 = 13,407.54/x
  3. Step 3: Cross multiply
    21,899.81x = 30,223.97 × 13,407.54
  4. Step 4: Simplify right side
    21,899.81x = 405,229,086.73
  5. Step 5: Solve for x
    x = 405,229,086.73/21,899.81
  6. Step 6: Final answer
    x = 18,503.77

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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.