Home / 21,809.28-30,102.56-13,432.80

Finding the Fourth Proportional to 21,809.28, 30,102.56 and 13,432.80

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Solution

The fourth proportional to 21,809.28, 30,102.56 and 13,432.80 is: 18,540.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.28 : 30,102.56 = 13,432.80 : x
  2. Step 2: Convert to fraction form
    21,809.28/30,102.56 = 13,432.80/x
  3. Step 3: Cross multiply
    21,809.28x = 30,102.56 × 13,432.80
  4. Step 4: Simplify right side
    21,809.28x = 404,361,667.97
  5. Step 5: Solve for x
    x = 404,361,667.97/21,809.28
  6. Step 6: Final answer
    x = 18,540.81

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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.