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Finding the Fourth Proportional to 13,884.50, 19,160.13 and 7,918.09

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Solution

The fourth proportional to 13,884.50, 19,160.13 and 7,918.09 is: 10,926.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,884.50 : 19,160.13 = 7,918.09 : x
  2. Step 2: Convert to fraction form
    13,884.50/19,160.13 = 7,918.09/x
  3. Step 3: Cross multiply
    13,884.50x = 19,160.13 × 7,918.09
  4. Step 4: Simplify right side
    13,884.50x = 151,711,633.75
  5. Step 5: Solve for x
    x = 151,711,633.75/13,884.50
  6. Step 6: Final answer
    x = 10,926.69

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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.