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Finding the Fourth Proportional to 18,732.60, 28,131.30 and 9,984.60

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Solution

The fourth proportional to 18,732.60, 28,131.30 and 9,984.60 is: 14,994.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.60 : 28,131.30 = 9,984.60 : x
  2. Step 2: Convert to fraction form
    18,732.60/28,131.30 = 9,984.60/x
  3. Step 3: Cross multiply
    18,732.60x = 28,131.30 × 9,984.60
  4. Step 4: Simplify right side
    18,732.60x = 280,879,777.98
  5. Step 5: Solve for x
    x = 280,879,777.98/18,732.60
  6. Step 6: Final answer
    x = 14,994.17

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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.