Home / 20,684.18-28,546.27-12,188.95

Finding the Fourth Proportional to 20,684.18, 28,546.27 and 12,188.95

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Solution

The fourth proportional to 20,684.18, 28,546.27 and 12,188.95 is: 16,821.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.18 : 28,546.27 = 12,188.95 : x
  2. Step 2: Convert to fraction form
    20,684.18/28,546.27 = 12,188.95/x
  3. Step 3: Cross multiply
    20,684.18x = 28,546.27 × 12,188.95
  4. Step 4: Simplify right side
    20,684.18x = 347,949,024.44
  5. Step 5: Solve for x
    x = 347,949,024.44/20,684.18
  6. Step 6: Final answer
    x = 16,821.99

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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.