Home / 12,620.57-18,781.88-12,200.12

Finding the Fourth Proportional to 12,620.57, 18,781.88 and 12,200.12

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Solution

The fourth proportional to 12,620.57, 18,781.88 and 12,200.12 is: 18,156.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.57 : 18,781.88 = 12,200.12 : x
  2. Step 2: Convert to fraction form
    12,620.57/18,781.88 = 12,200.12/x
  3. Step 3: Cross multiply
    12,620.57x = 18,781.88 × 12,200.12
  4. Step 4: Simplify right side
    12,620.57x = 229,141,034.92
  5. Step 5: Solve for x
    x = 229,141,034.92/12,620.57
  6. Step 6: Final answer
    x = 18,156.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.