Home / 21,278.22-29,367.49-12,331.16

Finding the Fourth Proportional to 21,278.22, 29,367.49 and 12,331.16

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Solution

The fourth proportional to 21,278.22, 29,367.49 and 12,331.16 is: 17,019.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.22 : 29,367.49 = 12,331.16 : x
  2. Step 2: Convert to fraction form
    21,278.22/29,367.49 = 12,331.16/x
  3. Step 3: Cross multiply
    21,278.22x = 29,367.49 × 12,331.16
  4. Step 4: Simplify right side
    21,278.22x = 362,135,217.99
  5. Step 5: Solve for x
    x = 362,135,217.99/21,278.22
  6. Step 6: Final answer
    x = 17,019.06

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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.