Home / 12,425.78-18,638.87-3,661.58

Finding the Fourth Proportional to 12,425.78, 18,638.87 and 3,661.58

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Solution

The fourth proportional to 12,425.78, 18,638.87 and 3,661.58 is: 5,492.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.78 : 18,638.87 = 3,661.58 : x
  2. Step 2: Convert to fraction form
    12,425.78/18,638.87 = 3,661.58/x
  3. Step 3: Cross multiply
    12,425.78x = 18,638.87 × 3,661.58
  4. Step 4: Simplify right side
    12,425.78x = 68,247,602.11
  5. Step 5: Solve for x
    x = 68,247,602.11/12,425.78
  6. Step 6: Final answer
    x = 5,492.42

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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.