Home / 21,955.21-30,290.72-12,393.97

Finding the Fourth Proportional to 21,955.21, 30,290.72 and 12,393.97

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Solution

The fourth proportional to 21,955.21, 30,290.72 and 12,393.97 is: 17,099.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.21 : 30,290.72 = 12,393.97 : x
  2. Step 2: Convert to fraction form
    21,955.21/30,290.72 = 12,393.97/x
  3. Step 3: Cross multiply
    21,955.21x = 30,290.72 × 12,393.97
  4. Step 4: Simplify right side
    21,955.21x = 375,422,274.96
  5. Step 5: Solve for x
    x = 375,422,274.96/21,955.21
  6. Step 6: Final answer
    x = 17,099.46

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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.