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Finding the Fourth Proportional to 18,672.57, 25,759.98 and 12,290.94

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Solution

The fourth proportional to 18,672.57, 25,759.98 and 12,290.94 is: 16,956.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.57 : 25,759.98 = 12,290.94 : x
  2. Step 2: Convert to fraction form
    18,672.57/25,759.98 = 12,290.94/x
  3. Step 3: Cross multiply
    18,672.57x = 25,759.98 × 12,290.94
  4. Step 4: Simplify right side
    18,672.57x = 316,614,368.58
  5. Step 5: Solve for x
    x = 316,614,368.58/18,672.57
  6. Step 6: Final answer
    x = 16,956.12

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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.