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Finding the Fourth Proportional to 13,751.71, 18,977.10 and 8,087.08

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Solution

The fourth proportional to 13,751.71, 18,977.10 and 8,087.08 is: 11,160.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.71 : 18,977.10 = 8,087.08 : x
  2. Step 2: Convert to fraction form
    13,751.71/18,977.10 = 8,087.08/x
  3. Step 3: Cross multiply
    13,751.71x = 18,977.10 × 8,087.08
  4. Step 4: Simplify right side
    13,751.71x = 153,469,325.87
  5. Step 5: Solve for x
    x = 153,469,325.87/13,751.71
  6. Step 6: Final answer
    x = 11,160.02

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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.