Home / 21,366.12-29,480.22-12,408.31

Finding the Fourth Proportional to 21,366.12, 29,480.22 and 12,408.31

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Solution

The fourth proportional to 21,366.12, 29,480.22 and 12,408.31 is: 17,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,366.12 : 29,480.22 = 12,408.31 : x
  2. Step 2: Convert to fraction form
    21,366.12/29,480.22 = 12,408.31/x
  3. Step 3: Cross multiply
    21,366.12x = 29,480.22 × 12,408.31
  4. Step 4: Simplify right side
    21,366.12x = 365,799,745.48
  5. Step 5: Solve for x
    x = 365,799,745.48/21,366.12
  6. Step 6: Final answer
    x = 17,120.55

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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.