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Finding the Fourth Proportional to 8,318.76, 12,492.96 and 7,984.26

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Solution

The fourth proportional to 8,318.76, 12,492.96 and 7,984.26 is: 11,990.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.76 : 12,492.96 = 7,984.26 : x
  2. Step 2: Convert to fraction form
    8,318.76/12,492.96 = 7,984.26/x
  3. Step 3: Cross multiply
    8,318.76x = 12,492.96 × 7,984.26
  4. Step 4: Simplify right side
    8,318.76x = 99,747,040.81
  5. Step 5: Solve for x
    x = 99,747,040.81/8,318.76
  6. Step 6: Final answer
    x = 11,990.61

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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.