Home / 13,620.91-20,445.68-12,070.84

Finding the Fourth Proportional to 13,620.91, 20,445.68 and 12,070.84

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Solution

The fourth proportional to 13,620.91, 20,445.68 and 12,070.84 is: 18,118.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.91 : 20,445.68 = 12,070.84 : x
  2. Step 2: Convert to fraction form
    13,620.91/20,445.68 = 12,070.84/x
  3. Step 3: Cross multiply
    13,620.91x = 20,445.68 × 12,070.84
  4. Step 4: Simplify right side
    13,620.91x = 246,796,531.97
  5. Step 5: Solve for x
    x = 246,796,531.97/13,620.91
  6. Step 6: Final answer
    x = 18,118.95

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1.5x scale

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.