Home / 21,825.40-30,119.09-12,393.96

Finding the Fourth Proportional to 21,825.40, 30,119.09 and 12,393.96

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Solution

The fourth proportional to 21,825.40, 30,119.09 and 12,393.96 is: 17,103.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,825.40 : 30,119.09 = 12,393.96 : x
  2. Step 2: Convert to fraction form
    21,825.40/30,119.09 = 12,393.96/x
  3. Step 3: Cross multiply
    21,825.40x = 30,119.09 × 12,393.96
  4. Step 4: Simplify right side
    21,825.40x = 373,294,796.70
  5. Step 5: Solve for x
    x = 373,294,796.70/21,825.40
  6. Step 6: Final answer
    x = 17,103.69

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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.