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Finding the Fourth Proportional to 18,527.84, 27,781.60 and 12,685.92

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Solution

The fourth proportional to 18,527.84, 27,781.60 and 12,685.92 is: 19,021.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,527.84 : 27,781.60 = 12,685.92 : x
  2. Step 2: Convert to fraction form
    18,527.84/27,781.60 = 12,685.92/x
  3. Step 3: Cross multiply
    18,527.84x = 27,781.60 × 12,685.92
  4. Step 4: Simplify right side
    18,527.84x = 352,435,155.07
  5. Step 5: Solve for x
    x = 352,435,155.07/18,527.84
  6. Step 6: Final answer
    x = 19,021.92

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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.