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Finding the Fourth Proportional to 13,808.70, 19,062.42 and 8,141.55

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Solution

The fourth proportional to 13,808.70, 19,062.42 and 8,141.55 is: 11,239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.70 : 19,062.42 = 8,141.55 : x
  2. Step 2: Convert to fraction form
    13,808.70/19,062.42 = 8,141.55/x
  3. Step 3: Cross multiply
    13,808.70x = 19,062.42 × 8,141.55
  4. Step 4: Simplify right side
    13,808.70x = 155,197,645.55
  5. Step 5: Solve for x
    x = 155,197,645.55/13,808.70
  6. Step 6: Final answer
    x = 11,239.12

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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.