Home / 21,826.88-30,119.66-12,872.34

Finding the Fourth Proportional to 21,826.88, 30,119.66 and 12,872.34

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Solution

The fourth proportional to 21,826.88, 30,119.66 and 12,872.34 is: 17,762.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,826.88 : 30,119.66 = 12,872.34 : x
  2. Step 2: Convert to fraction form
    21,826.88/30,119.66 = 12,872.34/x
  3. Step 3: Cross multiply
    21,826.88x = 30,119.66 × 12,872.34
  4. Step 4: Simplify right side
    21,826.88x = 387,710,504.20
  5. Step 5: Solve for x
    x = 387,710,504.20/21,826.88
  6. Step 6: Final answer
    x = 17,762.98

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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.