Home / 18,087.40-27,131.10-12,838.60

Finding the Fourth Proportional to 18,087.40, 27,131.10 and 12,838.60

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Solution

The fourth proportional to 18,087.40, 27,131.10 and 12,838.60 is: 19,257.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,087.40 : 27,131.10 = 12,838.60 : x
  2. Step 2: Convert to fraction form
    18,087.40/27,131.10 = 12,838.60/x
  3. Step 3: Cross multiply
    18,087.40x = 27,131.10 × 12,838.60
  4. Step 4: Simplify right side
    18,087.40x = 348,325,340.46
  5. Step 5: Solve for x
    x = 348,325,340.46/18,087.40
  6. Step 6: Final answer
    x = 19,257.90

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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.