Home / 21,243.25-29,322.98-12,859.75

Finding the Fourth Proportional to 21,243.25, 29,322.98 and 12,859.75

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Solution

The fourth proportional to 21,243.25, 29,322.98 and 12,859.75 is: 17,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.25 : 29,322.98 = 12,859.75 : x
  2. Step 2: Convert to fraction form
    21,243.25/29,322.98 = 12,859.75/x
  3. Step 3: Cross multiply
    21,243.25x = 29,322.98 × 12,859.75
  4. Step 4: Simplify right side
    21,243.25x = 377,086,192.06
  5. Step 5: Solve for x
    x = 377,086,192.06/21,243.25
  6. Step 6: Final answer
    x = 17,750.87

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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.