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Finding the Fourth Proportional to 13,141.95, 18,135.95 and 7,173.75

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Solution

The fourth proportional to 13,141.95, 18,135.95 and 7,173.75 is: 9,899.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.95 : 18,135.95 = 7,173.75 : x
  2. Step 2: Convert to fraction form
    13,141.95/18,135.95 = 7,173.75/x
  3. Step 3: Cross multiply
    13,141.95x = 18,135.95 × 7,173.75
  4. Step 4: Simplify right side
    13,141.95x = 130,102,735.44
  5. Step 5: Solve for x
    x = 130,102,735.44/13,141.95
  6. Step 6: Final answer
    x = 9,899.80

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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.