Home / 21,828.15-30,122.28-12,876.03

Finding the Fourth Proportional to 21,828.15, 30,122.28 and 12,876.03

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Solution

The fourth proportional to 21,828.15, 30,122.28 and 12,876.03 is: 17,768.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.15 : 30,122.28 = 12,876.03 : x
  2. Step 2: Convert to fraction form
    21,828.15/30,122.28 = 12,876.03/x
  3. Step 3: Cross multiply
    21,828.15x = 30,122.28 × 12,876.03
  4. Step 4: Simplify right side
    21,828.15x = 387,855,380.95
  5. Step 5: Solve for x
    x = 387,855,380.95/21,828.15
  6. Step 6: Final answer
    x = 17,768.59

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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.