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Finding the Fourth Proportional to 13,167.76, 18,171.80 and 7,199.80

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Solution

The fourth proportional to 13,167.76, 18,171.80 and 7,199.80 is: 9,935.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,167.76 : 18,171.80 = 7,199.80 : x
  2. Step 2: Convert to fraction form
    13,167.76/18,171.80 = 7,199.80/x
  3. Step 3: Cross multiply
    13,167.76x = 18,171.80 × 7,199.80
  4. Step 4: Simplify right side
    13,167.76x = 130,833,325.64
  5. Step 5: Solve for x
    x = 130,833,325.64/13,167.76
  6. Step 6: Final answer
    x = 9,935.88

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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.