Home / 21,331.92-29,443.32-12,955.44

Finding the Fourth Proportional to 21,331.92, 29,443.32 and 12,955.44

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Solution

The fourth proportional to 21,331.92, 29,443.32 and 12,955.44 is: 17,881.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.92 : 29,443.32 = 12,955.44 : x
  2. Step 2: Convert to fraction form
    21,331.92/29,443.32 = 12,955.44/x
  3. Step 3: Cross multiply
    21,331.92x = 29,443.32 × 12,955.44
  4. Step 4: Simplify right side
    21,331.92x = 381,451,165.66
  5. Step 5: Solve for x
    x = 381,451,165.66/21,331.92
  6. Step 6: Final answer
    x = 17,881.71

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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.