Home / 21,825.40-30,122.82-12,393.76

Finding the Fourth Proportional to 21,825.40, 30,122.82 and 12,393.76

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Solution

The fourth proportional to 21,825.40, 30,122.82 and 12,393.76 is: 17,105.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,825.40 : 30,122.82 = 12,393.76 : x
  2. Step 2: Convert to fraction form
    21,825.40/30,122.82 = 12,393.76/x
  3. Step 3: Cross multiply
    21,825.40x = 30,122.82 × 12,393.76
  4. Step 4: Simplify right side
    21,825.40x = 373,335,001.60
  5. Step 5: Solve for x
    x = 373,335,001.60/21,825.40
  6. Step 6: Final answer
    x = 17,105.53

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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.