Home / 12,620.07-18,781.13-12,199.61

Finding the Fourth Proportional to 12,620.07, 18,781.13 and 12,199.61

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Solution

The fourth proportional to 12,620.07, 18,781.13 and 12,199.61 is: 18,155.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.07 : 18,781.13 = 12,199.61 : x
  2. Step 2: Convert to fraction form
    12,620.07/18,781.13 = 12,199.61/x
  3. Step 3: Cross multiply
    12,620.07x = 18,781.13 × 12,199.61
  4. Step 4: Simplify right side
    12,620.07x = 229,122,538.81
  5. Step 5: Solve for x
    x = 229,122,538.81/12,620.07
  6. Step 6: Final answer
    x = 18,155.41

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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.