Home / 21,914.28-30,239.46-12,960.03

Finding the Fourth Proportional to 21,914.28, 30,239.46 and 12,960.03

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Solution

The fourth proportional to 21,914.28, 30,239.46 and 12,960.03 is: 17,883.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,914.28 : 30,239.46 = 12,960.03 : x
  2. Step 2: Convert to fraction form
    21,914.28/30,239.46 = 12,960.03/x
  3. Step 3: Cross multiply
    21,914.28x = 30,239.46 × 12,960.03
  4. Step 4: Simplify right side
    21,914.28x = 391,904,422.18
  5. Step 5: Solve for x
    x = 391,904,422.18/21,914.28
  6. Step 6: Final answer
    x = 17,883.52

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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.