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Finding the Fourth Proportional to 13,169.16, 18,171.95 and 7,791.76

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Solution

The fourth proportional to 13,169.16, 18,171.95 and 7,791.76 is: 10,751.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169.16 : 18,171.95 = 7,791.76 : x
  2. Step 2: Convert to fraction form
    13,169.16/18,171.95 = 7,791.76/x
  3. Step 3: Cross multiply
    13,169.16x = 18,171.95 × 7,791.76
  4. Step 4: Simplify right side
    13,169.16x = 141,591,492.61
  5. Step 5: Solve for x
    x = 141,591,492.61/13,169.16
  6. Step 6: Final answer
    x = 10,751.75

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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.