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Finding the Fourth Proportional to 18,374.55, 27,561.21 and 7,986.30

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Solution

The fourth proportional to 18,374.55, 27,561.21 and 7,986.30 is: 11,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,374.55 : 27,561.21 = 7,986.30 : x
  2. Step 2: Convert to fraction form
    18,374.55/27,561.21 = 7,986.30/x
  3. Step 3: Cross multiply
    18,374.55x = 27,561.21 × 7,986.30
  4. Step 4: Simplify right side
    18,374.55x = 220,112,091.42
  5. Step 5: Solve for x
    x = 220,112,091.42/18,374.55
  6. Step 6: Final answer
    x = 11,979.18

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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.