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Finding the Fourth Proportional to 12,651.25, 18,975.95 and 3,885.63

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Solution

The fourth proportional to 12,651.25, 18,975.95 and 3,885.63 is: 5,828.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.25 : 18,975.95 = 3,885.63 : x
  2. Step 2: Convert to fraction form
    12,651.25/18,975.95 = 3,885.63/x
  3. Step 3: Cross multiply
    12,651.25x = 18,975.95 × 3,885.63
  4. Step 4: Simplify right side
    12,651.25x = 73,733,425.72
  5. Step 5: Solve for x
    x = 73,733,425.72/12,651.25
  6. Step 6: Final answer
    x = 5,828.16

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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.