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Finding the Fourth Proportional to 18,667.88, 25,741.86 and 16,787.24

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Solution

The fourth proportional to 18,667.88, 25,741.86 and 16,787.24 is: 23,148.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.88 : 25,741.86 = 16,787.24 : x
  2. Step 2: Convert to fraction form
    18,667.88/25,741.86 = 16,787.24/x
  3. Step 3: Cross multiply
    18,667.88x = 25,741.86 × 16,787.24
  4. Step 4: Simplify right side
    18,667.88x = 432,134,781.87
  5. Step 5: Solve for x
    x = 432,134,781.87/18,667.88
  6. Step 6: Final answer
    x = 23,148.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.