Home / 21,828.88-30,122.42-12,874.34

Finding the Fourth Proportional to 21,828.88, 30,122.42 and 12,874.34

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Solution

The fourth proportional to 21,828.88, 30,122.42 and 12,874.34 is: 17,765.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.88 : 30,122.42 = 12,874.34 : x
  2. Step 2: Convert to fraction form
    21,828.88/30,122.42 = 12,874.34/x
  3. Step 3: Cross multiply
    21,828.88x = 30,122.42 × 12,874.34
  4. Step 4: Simplify right side
    21,828.88x = 387,806,276.70
  5. Step 5: Solve for x
    x = 387,806,276.70/21,828.88
  6. Step 6: Final answer
    x = 17,765.74

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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.