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Finding the Fourth Proportional to 18,743.31, 28,101.06 and 11,346.21

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Solution

The fourth proportional to 18,743.31, 28,101.06 and 11,346.21 is: 17,010.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,743.31 : 28,101.06 = 11,346.21 : x
  2. Step 2: Convert to fraction form
    18,743.31/28,101.06 = 11,346.21/x
  3. Step 3: Cross multiply
    18,743.31x = 28,101.06 × 11,346.21
  4. Step 4: Simplify right side
    18,743.31x = 318,840,527.98
  5. Step 5: Solve for x
    x = 318,840,527.98/18,743.31
  6. Step 6: Final answer
    x = 17,010.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.