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Finding the Fourth Proportional to 13,164.80, 18,167.64 and 7,860.08

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Solution

The fourth proportional to 13,164.80, 18,167.64 and 7,860.08 is: 10,847.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,164.80 : 18,167.64 = 7,860.08 : x
  2. Step 2: Convert to fraction form
    13,164.80/18,167.64 = 7,860.08/x
  3. Step 3: Cross multiply
    13,164.80x = 18,167.64 × 7,860.08
  4. Step 4: Simplify right side
    13,164.80x = 142,799,103.81
  5. Step 5: Solve for x
    x = 142,799,103.81/13,164.80
  6. Step 6: Final answer
    x = 10,847.04

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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.