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Finding the Fourth Proportional to 8,717.84, 12,025.28 and 8,134.64

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Solution

The fourth proportional to 8,717.84, 12,025.28 and 8,134.64 is: 11,220.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,717.84 : 12,025.28 = 8,134.64 : x
  2. Step 2: Convert to fraction form
    8,717.84/12,025.28 = 8,134.64/x
  3. Step 3: Cross multiply
    8,717.84x = 12,025.28 × 8,134.64
  4. Step 4: Simplify right side
    8,717.84x = 97,821,323.70
  5. Step 5: Solve for x
    x = 97,821,323.70/8,717.84
  6. Step 6: Final answer
    x = 11,220.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.