Home / 21,743.17-30,005.55-12,311.73

Finding the Fourth Proportional to 21,743.17, 30,005.55 and 12,311.73

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Solution

The fourth proportional to 21,743.17, 30,005.55 and 12,311.73 is: 16,990.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,743.17 : 30,005.55 = 12,311.73 : x
  2. Step 2: Convert to fraction form
    21,743.17/30,005.55 = 12,311.73/x
  3. Step 3: Cross multiply
    21,743.17x = 30,005.55 × 12,311.73
  4. Step 4: Simplify right side
    21,743.17x = 369,420,230.10
  5. Step 5: Solve for x
    x = 369,420,230.10/21,743.17
  6. Step 6: Final answer
    x = 16,990.18

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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.