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Finding the Fourth Proportional to 18,768.12, 28,127.34 and 9,984.12

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Solution

The fourth proportional to 18,768.12, 28,127.34 and 9,984.12 is: 14,962.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,768.12 : 28,127.34 = 9,984.12 : x
  2. Step 2: Convert to fraction form
    18,768.12/28,127.34 = 9,984.12/x
  3. Step 3: Cross multiply
    18,768.12x = 28,127.34 × 9,984.12
  4. Step 4: Simplify right side
    18,768.12x = 280,826,737.84
  5. Step 5: Solve for x
    x = 280,826,737.84/18,768.12
  6. Step 6: Final answer
    x = 14,962.97

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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.