Home / 12,178.40-18,267.68-3,858.38

Finding the Fourth Proportional to 12,178.40, 18,267.68 and 3,858.38

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Solution

The fourth proportional to 12,178.40, 18,267.68 and 3,858.38 is: 5,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.40 : 18,267.68 = 3,858.38 : x
  2. Step 2: Convert to fraction form
    12,178.40/18,267.68 = 3,858.38/x
  3. Step 3: Cross multiply
    12,178.40x = 18,267.68 × 3,858.38
  4. Step 4: Simplify right side
    12,178.40x = 70,483,719.02
  5. Step 5: Solve for x
    x = 70,483,719.02/12,178.40
  6. Step 6: Final answer
    x = 5,787.60

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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.