Home / 20,790.17-31,193-12,476.15

Finding the Fourth Proportional to 20,790.17, 31,193 and 12,476.15

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Solution

The fourth proportional to 20,790.17, 31,193 and 12,476.15 is: 18,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.17 : 31,193 = 12,476.15 : x
  2. Step 2: Convert to fraction form
    20,790.17/31,193 = 12,476.15/x
  3. Step 3: Cross multiply
    20,790.17x = 31,193 × 12,476.15
  4. Step 4: Simplify right side
    20,790.17x = 389,168,546.95
  5. Step 5: Solve for x
    x = 389,168,546.95/20,790.17
  6. Step 6: Final answer
    x = 18,718.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.