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Finding the Fourth Proportional to 18,487.12, 27,710.16 and 8,628.88

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Solution

The fourth proportional to 18,487.12, 27,710.16 and 8,628.88 is: 12,933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.12 : 27,710.16 = 8,628.88 : x
  2. Step 2: Convert to fraction form
    18,487.12/27,710.16 = 8,628.88/x
  3. Step 3: Cross multiply
    18,487.12x = 27,710.16 × 8,628.88
  4. Step 4: Simplify right side
    18,487.12x = 239,107,645.42
  5. Step 5: Solve for x
    x = 239,107,645.42/18,487.12
  6. Step 6: Final answer
    x = 12,933.74

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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.