Home / 13,170.40-18,178.36-11,042.55

Finding the Fourth Proportional to 13,170.40, 18,178.36 and 11,042.55

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Solution

The fourth proportional to 13,170.40, 18,178.36 and 11,042.55 is: 15,241.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.40 : 18,178.36 = 11,042.55 : x
  2. Step 2: Convert to fraction form
    13,170.40/18,178.36 = 11,042.55/x
  3. Step 3: Cross multiply
    13,170.40x = 18,178.36 × 11,042.55
  4. Step 4: Simplify right side
    13,170.40x = 200,735,421.61
  5. Step 5: Solve for x
    x = 200,735,421.61/13,170.40
  6. Step 6: Final answer
    x = 15,241.41

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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.