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Finding the Fourth Proportional to 18,686.94, 27,998.69 and 11,275.83

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Solution

The fourth proportional to 18,686.94, 27,998.69 and 11,275.83 is: 16,894.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.94 : 27,998.69 = 11,275.83 : x
  2. Step 2: Convert to fraction form
    18,686.94/27,998.69 = 11,275.83/x
  3. Step 3: Cross multiply
    18,686.94x = 27,998.69 × 11,275.83
  4. Step 4: Simplify right side
    18,686.94x = 315,708,314.57
  5. Step 5: Solve for x
    x = 315,708,314.57/18,686.94
  6. Step 6: Final answer
    x = 16,894.60

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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.