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Finding the Fourth Proportional to 22,385.31, 30,891.07 and 12,313.74

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Solution

The fourth proportional to 22,385.31, 30,891.07 and 12,313.74 is: 16,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,385.31 : 30,891.07 = 12,313.74 : x
  2. Step 2: Convert to fraction form
    22,385.31/30,891.07 = 12,313.74/x
  3. Step 3: Cross multiply
    22,385.31x = 30,891.07 × 12,313.74
  4. Step 4: Simplify right side
    22,385.31x = 380,384,604.30
  5. Step 5: Solve for x
    x = 380,384,604.30/22,385.31
  6. Step 6: Final answer
    x = 16,992.60

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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.