Home / 21,230.32-29,310.96-13,679.32

Finding the Fourth Proportional to 21,230.32, 29,310.96 and 13,679.32

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Solution

The fourth proportional to 21,230.32, 29,310.96 and 13,679.32 is: 18,885.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.32 : 29,310.96 = 13,679.32 : x
  2. Step 2: Convert to fraction form
    21,230.32/29,310.96 = 13,679.32/x
  3. Step 3: Cross multiply
    21,230.32x = 29,310.96 × 13,679.32
  4. Step 4: Simplify right side
    21,230.32x = 400,954,001.35
  5. Step 5: Solve for x
    x = 400,954,001.35/21,230.32
  6. Step 6: Final answer
    x = 18,885.91

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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.