Home / 21,392.91-29,517.21-12,892.77

Finding the Fourth Proportional to 21,392.91, 29,517.21 and 12,892.77

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Solution

The fourth proportional to 21,392.91, 29,517.21 and 12,892.77 is: 17,789.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,392.91 : 29,517.21 = 12,892.77 : x
  2. Step 2: Convert to fraction form
    21,392.91/29,517.21 = 12,892.77/x
  3. Step 3: Cross multiply
    21,392.91x = 29,517.21 × 12,892.77
  4. Step 4: Simplify right side
    21,392.91x = 380,558,599.57
  5. Step 5: Solve for x
    x = 380,558,599.57/21,392.91
  6. Step 6: Final answer
    x = 17,789.01

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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.